phase

noun
\ ˈfāz How to pronounce phase (audio) \

Definition of phase

 (Entry 1 of 2)

1 : a particular appearance or state in a regularly recurring cycle of changes phases of the moon
2a : a distinguishable part in a course, development, or cycle the early phases of her career
b : an aspect or part (as of a problem) under consideration
3 : the point or stage in a period of uniform circular motion, harmonic motion, or the periodic changes of any magnitude varying according to a simple harmonic law to which the rotation, oscillation, or variation has advanced from its standard position or assumed instant of starting
4 : a homogeneous, physically distinct, and mechanically separable portion of matter present in a nonhomogeneous physicochemical system
5 : an individual or subgroup distinguishably different in appearance or behavior from the norm of the group to which it belongs also : the distinguishing peculiarity
in phase
: in a synchronized or correlated manner
out of phase
: in an unsynchronized manner : not in correlation

phase

verb
phased; phasing

Definition of phase (Entry 2 of 2)

transitive verb

1 : to adjust so as to be in a synchronized condition
2 : to conduct or carry out by planned phases
3 : to introduce in stages usually used with in phase in new models

Keep scrolling for more

Other Words from phase

Noun

phasic \ ˈfā-​zik How to pronounce phasic (audio) \ adjective

Synonyms for phase

Synonyms: Noun

angle, aspect, facet, hand, side

Visit the Thesaurus for More 

Phase and Faze

Phase and faze are homophones (words pronounced alike but different in meaning, derivation, or spelling) that may easily be confused. Despite the similarity in pronunciation, these words bear little semantic resemblance to one another.

Although phase can function as a verb – it is found especially in combinations such as phase out, phase in, and phase into, meaning “to end, begin, etc. in phases” – the word is most commonly encountered as a noun, in which it typically carries a meaning related to steps in a process, cycles, or stages of development (as in “phases of the moon”).

Faze is generally used only as a verb, and means “to daunt or disconcert.” It often appears in negative expressions such as “it didn’t faze her a bit” or “nothing fazes him.”

Examples of phase in a Sentence

Noun

The project will be done in three phases. He's in the final phase of treatment now. The building project marks a new phase in the town's development. He has been throwing tantrums a lot, but the doctor says it's just a phase. a calendar based on the phases of the moon
See More

Recent Examples on the Web: Noun

Adani is having to fund the first, A$2bn ($1.4bn) phase of the Carmichael mine itself. The Economist, "Adani’s giant Australian coal mine gets the go-ahead," 29 June 2019 Saturday marked the completion of the first phase of the Panther Fitness Center. Shelby Dermer, Cincinnati.com, "Elder High School unveils first phase of new Panther Fitness Center," 29 June 2019 Dockside’s first phase will open in March, Universal officials say. Dewayne Bevil, orlandosentinel.com, "Universal Orlando: Surfside Inn hotel, Bigfire restaurant now open for business," 27 June 2019 An underground garage is planned for under the main Building 3, which would be part of the first phase of construction, along with Buildings 1, 2 and half of Building 4. cleveland.com, "Richmond Heights mall Belle Oaks site plan approved; city’s Family Day is July 7," 26 June 2019 In the first phase, contestants must enter and submit designs by Feb. 3, 2020. Catie Wegman, sun-sentinel.com, "NASA needs your help: Do you know how to grow plants in space?," 25 June 2019 Both were part of the first phase of a theater reconstruction plan envisioned by volunteers who had formed a Save Starlight group and obtained a special use permit from the city in November of 2017. San Diego Union-Tribune, "Second eucalyptus tree cut down next to historic Balboa Park theater," 3 July 2019 The first phase of the project will include 164 single-family homes and 59 townhomes built by Ashton Woods Homes and K. Hovnanian Homes. Steve Brown, Dallas News, "Sachse set for $250 million mixed-use development," 2 July 2019 The San Francisco to San Jose section is part of the first phase of the California high-speed rail system connecting San Francisco and Silicon Valley to the rest of the state. Gary Richards, The Mercury News, "Where will the high-speed rail stop in the Bay Area?," 2 July 2019

Recent Examples on the Web: Verb

The recommendations made in the tree report will be integrated into a comprehensive landscape plan that will be phased in with the complex-wide modernization plan that will occur over the next decade. Paulina Pineda, azcentral, "4 massive ficus trees surrounding Tempe City Hall to be cut down," 3 July 2019 While the change takes effect Monday, it will be phased in, with warnings issued starting Oct. 1 and tickets starting to be issued Jan. 1. Jim Turner, orlandosentinel.com, "100 new Florida laws go into effect Monday," 28 June 2019 Throughout the next two years, the extended platforms will be phased in at the 28 stations, Thomas said. Emma Ruby, Dallas News, "$60 million federal grant will help DART extend platforms, ease crowding on Red and Blue lines," 27 June 2019 The technology was first introduced on the 2018 Ford Expedition and Lincoln Navigator and will be phased-in across the entire North American lineup over the next few years. Phoebe Wall Howard, Detroit Free Press, "Kid-friendly Ford Ranger selling as a family car with new safety feature," 22 June 2019 Work is scheduled to begin this month and will be phased in to not impede shopping. Karen Pilarski, Milwaukee Journal Sentinel, "Outpost Natural Foods in Wauwatosa begins work on a $1.2 million expansion and remodel," 20 June 2019 The terminations will be phased in through July 20 as residents are moved out of the center, the company said. Ron Hurtibise, sun-sentinel.com, "More than 660 South Florida workers laid off," 19 June 2019 Regulators said the fee hikes, which will be phased in over two years, are necessary to reduce a massive shortfall. Tony Barboza, latimes.com, "Southern California’s most toxic polluters will pay more under air board’s fee hike," 7 June 2019 The new plans will be phased in, starting in September. NBC News, "Trump unveils new health plan; Democrats call it 'junk insurance'," 19 June 2018

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

See More

First Known Use of phase

Noun

1647, in the meaning defined at sense 1

Verb

1904, in the meaning defined at sense 1

History and Etymology for phase

Noun

New Latin phasis, from Greek, appearance of a star, phase of the moon, from phainein to show (middle voice, to appear) — more at fancy

Keep scrolling for more

Learn More about phase

Statistics for phase

Last Updated

10 Jul 2019

Look-up Popularity

Time Traveler for phase

The first known use of phase was in 1647

See more words from the same year

Keep scrolling for more

More Definitions for phase

phase

noun

English Language Learners Definition of phase

: a part or step in a process : one part in a series of related events or actions
: a short period of time during which a person behaves in a particular way or likes a particular thing
: the shape of the part of the moon that is visible at different times during a month

phase

noun
\ ˈfāz How to pronounce phase (audio) \

Kids Definition of phase

1 : a step or part in a series of events or actions : stage I have completed the first phase of my training.
2 : the way that the moon or a planet looks to the eye at any time in its series of changes with respect to how it shines The new moon and the full moon are two phases of the moon.

phase

noun
\ ˈfāz How to pronounce phase (audio) \

Medical Definition of phase

1 : a particular appearance or state in a regularly recurring cycle of changes
2 : a distinguishable part in a course, development, or cycle the early phases of a disease
3 : a point or stage in the period of a periodic motion or process (as a light wave or a vibration) in relation to an arbitrary reference or starting point in the period
4 : a homogeneous, physically distinct, and mechanically separable portion of matter present in a nonhomogeneous physicochemical system especially : one of the fundamental states of matter usually considered to include the solid, liquid, and gaseous forms
5 : an individual or subgroup distinguishably different in appearance or behavior from the norm of the group to which it belongs also : the distinguishing peculiarity

Keep scrolling for more

More from Merriam-Webster on phase

Thesaurus: All synonyms and antonyms for phase

Spanish Central: Translation of phase

Nglish: Translation of phase for Spanish Speakers

Britannica English: Translation of phase for Arabic Speakers

Britannica.com: Encyclopedia article about phase

Comments on phase

What made you want to look up phase? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

to form ideas or theories about something

Get Word of the Day daily email!

Test Your Vocabulary

Farm Idioms Quiz

  • cow coming home
  • What does 'poke' refer to in the expression 'pig in a poke'?
Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ
Bee Cubed

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!