\ˈin, ən, ᵊn\

Definition of in 

(Entry 1 of 11)

1a used as a function word to indicate inclusion, location, or position within limits in the lakewounded in the legin the summer

b : into sense 1 went in the house

2 used as a function word to indicate means, medium, or instrumentality written in pencilbound in leather

3a used as a function word to indicate limitation, qualification, or circumstance alike in some respectsleft in a hurry

b : into sense 2a broke in pieces

4 used as a function word to indicate purpose said in reply

5 used as a function word to indicate the larger member of a ratio one in six is eligible

in

adverb
\ˈin \

Definition of in (Entry 2 of 11)

1a(1) : to or toward the inside especially of a house or other building come in

(2) : to or toward some destination or particular place flew in on the first plane

(3) : at close quarters : near play close in

b : so as to incorporate mix in the flour often used in combination built-in bookcases

c : to or at an appropriate place fit a piece in

2a : within a particular place especially : within the customary place of residence or business the doctor is in

b : in the position of participant, insider, or officeholder often used with on in on the joke

c(1) : on good terms

(2) : in a specified relation in bad with the boss

(3) : in a position of assured or definitive success

d : in vogue or season

e of an oil well : in production

f : in one's presence, possession, or control after the crops are in

g : from a condition of indistinguishability to one of clarity fade in

in for

: certain to experience in for a rude awakening

\ˈin \

Definition of in (Entry 3 of 11)

1a : that is located inside or within the in part

b : that is in position, operation, or power the in party

c : inside sense 2

2 : that is directed or bound inward : incoming the in train

3a : extremely fashionable the in thing to do

b : keenly aware of and responsive to what is new and fashionable the in crowd

in

noun
\ˈin \

Definition of in (Entry 4 of 11)

1 : one who is in office or power or on the inside a matter of ins versus outs

2 : influence, pull enjoyed some sort of in with the commandant— Henriette Roosenburg

in

abbreviation (1)

Definition of in (Entry 5 of 11)

1 inch

2 inlet

In

symbol

Definition of In (Entry 6 of 11)

indium

IN

abbreviation (2)

Definition of IN (Entry 7 of 11)

Indiana

in-

prefix (1)
variants: or il- or im- or ir-

Definition of in- (Entry 8 of 11)

: not : non-, un- usually il- before l illogical , im- before b, m, or p imbalanceimmoralimpractical , ir- before r irreducible , and in- before other sounds inconclusive

in-

prefix (2)
variants: or il- or im- or ir-

Definition of in- (Entry 9 of 11)

1 : in : within : into : toward : on usually il- before l illuviation , im- before b, m, or p immingle , ir- before r irradiance , and in- before other sounds infiltrate

2 : en- entry 1 imbrute imperil inspirit

Definition of -in (Entry 10 of 11)

1a : neutral chemical compound insulin

b : enzyme pancreatin

c : antibiotic penicillin

2 : -ine entry 2 sense 1a epinephrin

3 : pharmaceutical product niacin

Definition of -in (Entry 11 of 11)

: organized public protest by means of or in favor of : demonstration teach-in love-in

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Synonyms & Antonyms for in

Synonyms: Preposition

by, per, through, via, with

Synonyms: Adverb

around, by, close, hard, near, nearby, nigh

Synonyms: Adjective

à la mode (also a la mode), au courant, chic, cool [slang], exclusive, fashionable, fresh [slang], happening, hip, modish, sharp, smart, snappy, stylish, supercool, swell, swish, trendy, voguish

Synonyms: Noun

authority, clout, credit, heft, influence, juice [slang], leverage, pull, sway, weight

Antonyms: Adjective

dowdy, out, outmoded, styleless, unchic, uncool, unfashionable, unmodish, unstylish

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Examples of in in a Sentence

Preposition

Don't come in here with those muddy feet! drawn on the wall in crayon

Adverb

She went in and closed the door. I lost my keys and now I can't get in. The burglars broke in through the kitchen window. The pool is deep. Be careful not to fall in. The boss called us in for a conference. The fog was closing in fast. Get your orders in early! Is the train in yet?

Adjective

the in thing to do the in place to go It's what the in crowd is wearing this season.

Noun

When you're trying to get started in show business, it helps to have an in. They must have an in with the boss.
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Recent Examples on the Web: Adverb

Totally understandable, considering the video packs in important moments from not one but four iconic films and includes an unforgettable cameo from Kris Jenner, which is no small feat. Kara Nesvig, Teen Vogue, ""Thank U, Next" Director on the "Mean Girls" Scene Cut From Ariana Grande's Video," 1 Dec. 2018 Yeast is like a jungle plant that thrives in damp, warm environments. Isadora Baum, SELF, "8 Reasons Your Vulva or Vagina Might Get All Swollen," 30 Nov. 2018 These mean that the Assistant will acknowledge their politeness and respond in kind. James Vincent, The Verge, "Google Assistant adds Pretty Please functionality, updated lists, and other features," 29 Nov. 2018 The moment, which would end in disheveled, catastrophic-level hair for most, offered further proof that Beckham is forever ready for ensuing paparazzi. Christian Allaire, Vogue, "Victoria Beckham Has a Major Wind Machine Hair Moment in New York City," 28 Nov. 2018 At a glance, this house from Kenta Eto Architects appears to blend in perfectly with its surroundings. Liz Stinson, Curbed, "Modern Japanese house has a climbable roof," 26 Nov. 2018 These are little plastic pieces that let the gas generated from fermentation flow out and prevent new air from flowing in. Casey Johnston, Ars Technica, "Store-bought is not enough: My first hard cider homebrew," 22 Nov. 2018 At the time of testing, the 860 EVO was the fastest triple-layer cell SATA SSD, and it didn’t get bogged down in big write jobs, as many other TLC drives are wont to do. Ian Paul, PCWorld, "Go grab our favorite SSD, the 1TB Samsung 860 Evo, for less than $150 at Amazon today," 15 Nov. 2018 As of October 28, Beauty Bakerie is available at Ulta, and the rave reviews are already pouring in. Maria Cassano, Allure, "Beauty Bakerie Is Now Sold at Ulta Stores," 31 Oct. 2018

Recent Examples on the Web: Adjective

Andre Roberson's injury has hurt them worse than anyone could have imagined, and suddenly the all-in bet on one year of George is becoming a more sobering proposition. Andrew Sharp, SI.com, "The Year of Stress in the Western Conference," 9 Mar. 2018 But this latest test suggests that the United States may already be in range as well, and that, as one former top American intelligence official noted recently, would put enormous pressure on American missile defenses that few trust to work. Chris Stirewalt, Fox News, "Trump looks east for new foreign policy," 5 July 2017 But this latest test suggests that the United States may already be in range as well, and that, as one former top American intelligence official noted recently, would put enormous pressure on American missile defenses that few trust to work. David E. Sanger, New York Times, "What Can Trump Do About North Korea? His Options Are Few and Risky," 4 July 2017

Recent Examples on the Web: Noun

Microsoft had previously used an add-in to provide this type of PowerPoint functionality in the past, and Google also provides similar features in G Suite. Tom Warren, The Verge, "Microsoft PowerPoint is getting real-time captions and subtitles for presentations," 3 Dec. 2018 As to whether the pink swath of hair is actually dyed, or a case of an ingenious clip-in? Christian Allaire, Vogue, "Bella Hadid’s Techno Pink Hair Reveal is a Lesson in Low-Commitment, High-Impact Color," 30 Nov. 2018 The flag was originally raised in 1961 as a statement of opposition to the Civil Rights Movement and lunch counter sit-ins occurring at the time. Bree Newsome, SELF, "The 2018 Midterm Elections Proved That Change Must Happen from the Ground Up," 15 Nov. 2018 Hunting, trading, and even bounty hunting are all viable careers, for a time, and all provide exceptional opportunities to marvel at the glittering rural American sky or the sweeping Rocky Mountain stand-ins. Daniel Starkey, Ars Technica, "Red Dead Redemption II review: Getting muddy in the wide-open frontier," 25 Oct. 2018 With today’s thorny set of social rules, however, managing your in-laws is more complicated than ever. Alessandra Stanley, Town & Country, "New Solutions for Managing the Most Troublesome In-Laws," 19 Oct. 2018 In December 2015, just days after signing right-hander Zack Greinke to a $206.5 million deal, the Diamondbacks felt the time was right to push all-in. Nick Piecoro, azcentral, "Arizona Diamondbacks' Shelby Miller trade still haunting them," 13 July 2018 Both women won six-year terms in 2007 as write-ins. Zak Koeske, Daily Southtown, "For years, there's been no financial oversight at the Calumet Park library. Now the state is getting involved.," 13 July 2018 The brutal slayings took place at a family gathering in Gardendale, Ala., on Christmas Eve after Borden had brought the couple’s three children to his in-laws' home. Andrew O'reilly, Fox News, "Alabama death row inmate apparently commits suicide by hanging himself in jail cell," 3 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'in.' 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 in

Preposition

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

Adverb

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

Adjective

1599, in the meaning defined at sense 1a

Noun

1764, in the meaning defined at sense 1

History and Etymology for in

Preposition

Middle English, from Old English; akin to Old High German in in, Latin in, Greek en

Prefix (1)

Middle English, from Anglo-French, from Latin; akin to Old English un-

Prefix (2)

Middle English, from Anglo-French, from Latin, from in in, into

Noun suffix

French -ine, from Latin -īna, feminine of -īnus of or belonging to — more at -en

Noun combining form

sit-in

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Learn More about in

Dictionary Entries near in

impx

imu

I must love you and leave you

in

-in

IN

in-

Statistics for in

Look-up Popularity

Time Traveler for in

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

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More Definitions for in

English Language Learners Definition of in

 (Entry 1 of 4)

—used to indicate location or position within something

: to the inside of (a room, container, etc.)

—used to indicate that someone or something belongs to or is included as part of something

in

adverb

English Language Learners Definition of in (Entry 2 of 4)

: to or toward the inside of something (such as a building)

: to or toward a place

: at the place where someone or something arrives after traveling

English Language Learners Definition of in (Entry 3 of 4)

: popular or fashionable

: aware of and strongly influenced by what is new and fashionable

in

noun

English Language Learners Definition of in (Entry 4 of 4)

: a way of becoming involved in something or of influencing someone

\ˈin, ən\

Kids Definition of in

 (Entry 1 of 7)

1 : located or positioned within The house is in the country.

2 : into sense 1 We ran in the house.

3 : during It's warmer in the summer.

4 : with sense 2 I wrote in pencil.

5 used to show a state or condition You're in luck!We're in trouble.

6 used to show manner or purpose I'm in a hurry.He laughed in reply.

7 : into sense 2 It broke in pieces.

in

adverb
\ˈin \

Kids Definition of in (Entry 2 of 7)

1 : to or toward the inside I went in and closed the door.

2 : to or toward some particular place We flew in yesterday.

3 : near entry 1 sense 1 Play close in.

4 : into the midst of something Mix in the flour.

5 : to or at its proper place Can you fit this piece in?

6 : on the inner side : within Everyone is in.

7 : present and available for use All the votes are in.

in for

: sure to experience He was in for a surprise.

\ˈin \

Kids Definition of in (Entry 3 of 7)

1 : being inside or within the in part

2 : headed or bound inward the in train

Kids Definition of in.

inch

Kids Definition of IN

Indiana

in-

prefix
variants: or il- or im- or ir-

Kids Definition of in-

 (Entry 1 of 7)

: not : non-, un- usually il- before l illogical , im- before b, m, or p immoralimpractical , ir- before r irreconcilable and in- before other sounds incomplete

in-

prefix
variants: or il- or im- or ir-

Kids Definition of in- (Entry 2 of 7)

1 : in : within : into : toward : on usually il- before l illuminate , im- before b, m, or p import , ir- before r irradiate , and in- before other sounds infect

2 : en- sense 2 imperil

Medical Definition of in 

(Entry 1 of 2)

inch

In

symbol

Medical Definition of In (Entry 2 of 2)

indium

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Legal Definition of in 

: under the law of : based on brought an action in negligenceNational Law Journal

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More from Merriam-Webster on in

Rhyming Dictionary: Words that rhyme with in

Thesaurus: All synonyms and antonyms for in

Spanish Central: Translation of in

Nglish: Translation of in for Spanish Speakers

Britannica English: Translation of in for Arabic Speakers

Britannica.com: Encyclopedia article about in

Comments on in

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

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