\ ˈsmüt͟h How to pronounce smooth (audio) \

Definition of smooth

 (Entry 1 of 3)

1a(1) : having a continuous even surface
(2) of a curve : being the representation of a function with a continuous first derivative
(3) : having or being a short even coat of hair a smooth collie — compare rough, wirehaired
b : being without hair
c : glabrous a smooth leaf
d : causing no resistance to sliding
2 : free from difficulties or impediments the smooth course of his life
3 : even and uninterrupted in flow or flight
4 : excessively and often artfully suave : ingratiating a smooth operator
5a : serene, equable a smooth disposition
6a : not sharp or harsh a smooth sherry
b : free from lumps


smoothed; smoothing; smooths also smoothes

Definition of smooth (Entry 2 of 3)

transitive verb

1 : to make smooth
2a : to free from what is harsh or disagreeable : polish smoothed out his style
b : soothe
3 : to minimize (something, such as a fault) especially in order to allay anger or ill will his main job is to smooth over the friction that so often arises— Brian Crozier
4 : to free from obstruction or difficulty conciliation smoothed the way to an agreement
5a : to press flat smoothed down the folds of her dress
b : to remove expression from (one's face) : compose
6 : to cause to lie evenly and in order : preen a bird smoothing its feathers
7 : to free (a graph, a collection of data, etc.) from irregularities

intransitive verb

: to become smooth



Definition of smooth (Entry 3 of 3)

1 : a smooth part
2 : the act of smoothing
3 : a smoothing implement

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Other Words from smooth


smooth adverb
smoothly adverb
smoothness noun


smoother noun

Synonyms & Antonyms for smooth

Synonyms: Adjective

Synonyms: Verb

Antonyms: Adjective

Antonyms: Verb

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Choose the Right Synonym for smooth


level, flat, plane, even, smooth mean having a surface without bends, curves, or irregularities. level applies to a horizontal surface that lies on a line parallel with the horizon. the vast prairies are nearly level flat applies to a surface devoid of noticeable curvatures, prominences, or depressions. the work surface must be flat plane applies to any real or imaginary flat surface in which a straight line between any two points on it lies wholly within that surface. the plane sides of a crystal even applies to a surface that is noticeably flat or level or to a line that is observably straight. trim the hedge so it is even smooth applies especially to a polished surface free of irregularities. a smooth skating rink

easy, facile, simple, light, effortless, smooth mean not demanding effort or involving difficulty. easy is applicable either to persons or things imposing tasks or to activity required by such tasks. an easy college course facile often adds to easy the connotation of undue haste or shallowness. facile answers to complex questions simple stresses ease in understanding or dealing with because complication is absent. a simple problem in arithmetic light stresses freedom from what is burdensome. a light teaching load effortless stresses the appearance of ease and usually implies the prior attainment of artistry or expertness. moving with effortless grace smooth stresses the absence or removal of all difficulties, hardships, or obstacles. a smooth ride

suave, urbane, diplomatic, bland, smooth, politic mean pleasantly tactful and well-mannered. suave suggests a specific ability to deal with others easily and without friction. a suave public relations coordinator urbane implies high cultivation and poise coming from wide social experience. an urbane traveler diplomatic stresses an ability to deal with ticklish situations tactfully. a diplomatic negotiator bland emphasizes mildness of manner and absence of irritating qualities. a bland master of ceremonies smooth suggests often a deliberately assumed suavity. a smooth salesman politic implies shrewd as well as tactful and suave handling of people. a cunningly politic manager

Examples of smooth in a Sentence

Adjective They groomed the ski trail so it was smooth. The river rocks had been worn smooth by the water. Whisk the flour into the gravy until it is smooth. The milkshake was smooth and creamy. With the aid of observers, the election process was a smooth one. Our trip was smooth and uneventful. the smooth movements of a swimmer She has a nice, smooth golf swing. His new car has a smooth ride. Our flight was very smooth. Verb He smoothed his tie and headed out the door. The coin's date had been smoothed away over time. Smooth the cream on after your shower. Smooth the wax over the wood before polishing. She smoothed on some moisturizer before she put on her makeup. He smoothed ointment over the cut.
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Recent Examples on the Web: Adjective Their closed indoor spaces are full of smooth surfaces made of steel and plastic, where the coronavirus can linger for days if not cleaned. Bruce Selcraig,, "VIA might cut San Antonio area bus service by 25 percent for driver safety," 18 Mar. 2020 Let stand until the chocolate has melted, then stir until smooth. Jessica Battilana,, "Repertoire: A chocolate-prune cake that masquerades as a loaf," 13 Mar. 2020 With this new invention of flexible glass, the Z Flip promised a return to a hard, smooth, scratch-resistant display surface. Ron Amadeo, Ars Technica, "Samsung’s “Ultra Thin Glass” doesn’t seem much stronger than plastic," 17 Feb. 2020 Images from the spacecraft’s flyby show that Arrokoth has two connected lobes, a smooth surface and a uniform composition. Fox News, "NASA’s New Horizons mission sheds new light on how planets form," 15 Feb. 2020 Arrokoth's smooth surface is another indicator that the object is largely unchanged even after billions of years. Ashley Strickland, CNN, "Distant object in our solar system could show how planets form, scientists reveal," 13 Feb. 2020 These days commercial printing is dominated by offset—in which an inked image is transferred onto a smooth surface and thence onto paper—and digital—in which ink is sprayed directly onto the page. The Economist, "Setting type How the world’s old printing presses are being brought back to life," 18 Dec. 2019 For example, canines typically prefer to put their feet on a clean, smooth, level surface, and lynx would rather step in a small depression or on top of a small mound. Tyler Freel, Outdoor Life, "10 Lessons for First-Time Fur Trappers," 17 Dec. 2019 Its smooth surface also makes it a breeze to clean, cutting down on half of the kitchen angst. Popular Science, "I tried a bajillion new products this year. Here are 17 you should actually buy.," 16 Dec. 2019 Recent Examples on the Web: Verb On Thursday, the Federal Reserve unveiled a massive short-term lending program to try to help smooth trading in U.S. Treasurys. Alex Veiga, Anchorage Daily News, "Wall Street surges after worst slide since Black Monday 1987," 13 Mar. 2020 Trading was turbulent, with stocks staging a brief comeback as investors reacted to the Federal Reserve’s decision to offer at least $1.5 trillion worth of loans to banks to help smooth out the functioning of the financial markets. New York Times, "Stocks Plunge by the Most Since 1987, and Asia Follows: Live Updates," 13 Mar. 2020 And building a facility that acts as a battery can help smooth out the natural ebbs and flows that come both from renewable energy technology and from the spread out, failure-prone nature of more rural grid sections. Caroline Delbert, Popular Mechanics, "Elon Musk's Battery Farm Is an Undeniable Success," 10 Mar. 2020 The belief is that a new entrance would help smooth traffic flow on Wilson Mills Road and eliminate the tie-ups that occur when students are dropped off and picked up. cleveland, "Mayfield voters to decide two zoning issues March 17," 7 Mar. 2020 Knowing that these clashes are coming will help smooth the way as the biopharma industry integrates bioengineering deeper and more broadly. Vijay Pande, STAT, "Welcome to the bioengineering culture clash," 10 Jan. 2020 Everything the man in your life needs to shave, soften and smooth his skin — for the perfect shave from start to finish. Jessica Migala, NBC News, "18 last-minute gift ideas for anyone left on your holiday list," 16 Dec. 2019 Pour the batter into the loaf pan and smooth out the top. Dayana Sarkisova, The Denver Post, "An unabashedly chocolatey pumpkin bread is your next baking project," 4 Nov. 2019 The serum claims to clarify and smooth the skin using lactic acid, brighten the appearance of dark spots with licorice and lemongrass extracts, and soothe redness with prickly pear extract. Jessica Kasparian, USA TODAY, "20 amazing gifts for beauty, makeup, and skincare lovers," 22 Oct. 2019 Recent Examples on the Web: Noun Vitamin E floods your skin with moisture while the 100% cruelty-free concealer smooths and brightens the appearance of dark circles. Nicole Saunders, CNN Underscored, "The 20 best under-eye concealers, according to celebrity makeup artists," 26 Dec. 2019 Although its handoff between gas and electric power is sometimes less-than-smooth, the powertrain is responsive around town and when pulling away from stoplights. Eric Stafford, Car and Driver, "2019 Honda Accord Hybrid vs. 2019 Toyota Camry Hybrid: Which Gas-Sipping Family Sedan Is Better?," 8 Jan. 2020 Your once smooth, shiny wood flooring may have become scratched and dull. Dallas News, "Spruce up your house for spring sale," 19 Jan. 2020 The most noticeable difference between the two powertrains is that the eTorque hybrid system smooths and quickens the V-6's stop-start system. Mike Sutton, Car and Driver, "Do the 2020 Jeep Wrangler's New Engines Improve the Icon?," 7 Jan. 2020 Shaped like a round brush, the Revlon hot air brush boasts ionic technology to combat frizz, leaving your hair silky smooth while locking in mega volume. Susan Brickell,, "The Best-Selling Air Dryer Brush with Over 13,000 Amazon Reviews Is 30% Off—But Only Until Tonight," 2 Dec. 2019 While air temperatures tend to wobble around from year to year, responding to big patterns like El Niño—the periodic Pacific water-warming weather event—the ocean smooths out the signal, integrating all the warming that’s happened over past years. Alejandra Borunda, National Geographic, "The decade we finally woke up to climate change," 12 Dec. 2019 Looking for a product that detangles, smooths, and moisturizes your hair? Jessica Kasparian, USA TODAY, "The best Black Friday deals from Ulta," 29 Nov. 2019 The Pure Shampoo promises a gentle cleanse that thoroughly removes impurities and excess oils while nourishing the hair and scalp — not stripping them — and The Pure Conditioner moisturizes, smooths, and detangles without weighing hair down. Marci Robin, Allure, "Frédéric Fekkai's New Pure Hair-Care Collection Shines a Luxurious New Light on Clean Ingredients," 19 Sep. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'smooth.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of smooth


before the 12th century, in the meaning defined at sense 1a(1)


15th century, in the meaning defined at transitive sense 1


15th century, in the meaning defined at sense 1

History and Etymology for smooth


Middle English smothe, from Old English smōth; akin to Old Saxon smōthi smooth

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Time Traveler for smooth

Time Traveler

The first known use of smooth was before the 12th century

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Statistics for smooth

Last Updated

26 Mar 2020

Cite this Entry

“Smooth.” Dictionary, Merriam-Webster, Accessed 9 Apr. 2020.

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More Definitions for smooth


How to pronounce smooth (audio)

English Language Learners Definition of smooth

 (Entry 1 of 2)

: having a flat, even surface : not rough : not having any bumps, ridges, or uneven parts
of a liquid mixture : not having any lumps : mixed together so there are no lumps
: happening or done without any problems



English Language Learners Definition of smooth (Entry 2 of 2)

: to make (something) smooth
: to remove problems or difficulties from a situation
: to spread (something) over a surface (such as your skin) : to apply (something) by rubbing it on a surface


\ ˈsmüt͟h How to pronounce smooth (audio) \
smoother; smoothest

Kids Definition of smooth

 (Entry 1 of 2)

1 : not rough or uneven in surface a smooth board
2 : not hairy a smooth face
3 : free from difficulties or things in the way a smooth path a smooth journey
4 : moving or progressing without breaks, sudden changes, or shifts a smooth stream smooth speech
5 : appearing to be friendly and flattering without really meaning it a smooth talker

Other Words from smooth

smoothly adverb
smoothness noun


smoothed; smoothing

Kids Definition of smooth (Entry 2 of 2)

1 : to remove bumps, lumps, or wrinkles : make smooth
2 : to free from trouble or difficulty Pioneers smoothed the way for us.


\ ˈsmüt͟h How to pronounce smooth (audio) \

Medical Definition of smooth

: forming or being a colony with a flat shiny surface usually made up of organisms that form no chains or filaments, show characteristic internal changes, and tend toward marked increase in capsule formation and virulence used of dissociated strains of bacteria — compare rough

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More from Merriam-Webster on smooth

Thesaurus: All synonyms and antonyms for smooth

Rhyming Dictionary: Words that rhyme with smooth

Spanish Central: Translation of smooth

Nglish: Translation of smooth for Spanish Speakers

Britannica English: Translation of smooth for Arabic Speakers

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