\ ˈin How to pronounce in (audio) , 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 4a 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


\ ˈin How to pronounce in (audio) \

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 How to pronounce in (audio) \

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
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


\ ˈin How to pronounce in (audio) \

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

Definition of in (Entry 5 of 11)

1 inch
2 inlet



Definition of In (Entry 6 of 11)


Definition of IN (Entry 7 of 11)

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
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

Synonyms: Adverb

Synonyms: Adjective

Synonyms: Noun

Antonyms: Adjective

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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: Preposition Atkins did not take part in the Lions' voluntary organized team activities practice that was open to reporters last Thursday. Dave Birkett, Detroit Free Press, 3 June 2021 This was his second arrest in Hamilton County this year. Cameron Knight, The Enquirer, 3 June 2021 The health crisis ruined the 20th anniversary edition of SITG, which was due to take place in July 2020 with headliners Flume, The Strokes and Tyler, The Creator, and many more, but was ultimately pushed back, more than once. Lars Brandle, Billboard, 2 June 2021 In 2021, visitors who go to Kentucky Kingdom and other participating venues can take part in three challenges. Gabrielle Bunton, The Courier-Journal, 2 June 2021 With summer weather beginning to arrive, the Park District of Oak Park has welcome news for those eager to take a dip in its two swimming pools. Steve Schering, chicagotribune.com, 2 June 2021 Production will begin soon on the Toyota Corolla Cross – the SUV announced Wednesday at the plant in Limestone County. Paul Gattis | Pgattis@al.com, al, 2 June 2021 One person remains missing and one person had to be rescued after a group of 10 tried to swim across the Chattahoochee River in east Cobb County. Henri Hollis, ajc, 2 June 2021 Kristen came to Baltimore Sun Media from The Enterprise in St. Mary’s County where she was honored by a state press association as the Rookie of the Year. Kristen Griffith, baltimoresun.com/maryland/carroll, 2 June 2021 Recent Examples on the Web: Adverb That self-audit can also highlight skills that might need to be brought in or outsourced. Molly Baker, WSJ, 2 June 2021 With no money coming in from ticket sales and concessions, AMC fell behind on its rent. NBC News, 2 June 2021 More are coming on the second day, but there’s more of a mix with players coming in from Alabama’s neighboring states of Florida, Georgia and Mississippi. Giana Han, al, 2 June 2021 There is a song leader and there's a songbook with like 900 songs in there. Sid Evans, Southern Living, 1 June 2021 Allen places an emphasis on understanding traditions of the state, particularly for recruits coming in from outside Indiana. Stefan Krajisnik, The Indianapolis Star, 30 May 2021 How to adopt: The Arizona Humane Society’s adoption locations remain closed as the shelter continues to heal and rehabilitate pets coming in but its Virtual Matchmaking Adoptions by appointment is available to place pets with their forever families. The Arizona Republic, 28 May 2021 Neither death nor a pandemic will stop Natasha Romanoff (Scarlett Johansson) from getting her long-in-coming and then delayed solo film. Alison Willmore, Vulture, 24 May 2021 With so many emails coming in, messages can slip through the cracks. Kim Komando, USA TODAY, 23 May 2021 Recent Examples on the Web: Adjective Epic, which publishes hit game Fortnite, decided to sell discounted V-bucks, its in-game currency—but only through Epic’s own direct payment system, including on smartphone. Cecilia D'anastasio, Wired, 7 May 2021 His in-game discussion with Martins was somewhat related, Chapman said. Matt Kawahara, San Francisco Chronicle, 29 Apr. 2021 Samsung, on the other hand, saw success with its Galaxy smartwatches despite the gamble of loading them up with its in-house Tizen OS. Julian Chokkattu, Wired, 18 May 2021 The pet retailer says its in-house insurance plan will subsidize the cost of the diagnostic. San Diego Union-Tribune, 18 May 2021 And none of his in-house critics have had an opportunity to speak about it on Fox's airwaves. Brian Stelter, CNN, 6 May 2021 With 33 seconds left, Love was positioned under the basket – awaiting to receive the ball from the official for an in-bounds pass. Terry Pluto, cleveland, 27 Apr. 2021 The markings engraved on the oscillating mass and the column wheel of its in-house movement are also green and visible through its sapphire crystal caseback. Bryan Hood, Robb Report, 23 Apr. 2021 On top of that, Asos sells countless matching sets from its in-house brands and classics (think Adidas and Champion) alike. Dale Arden Chong, Glamour, 5 Apr. 2021 Recent Examples on the Web: Noun Things didn’t get much better with both fighters talking trash on social media and up close and personal at Friday’s weigh-in. Troy L. Smith, cleveland, 5 June 2021 Second, Huawei smartphones have a desktop mode (named EMUI desktop) built-in which can be used when connected to the MateView. Ben Sin, Forbes, 4 June 2021 Augustine was closed for almost a year save for a brief, frustrating reopening attempt last summer, and for now, entry to the Sherman Oaks hideaway requires reservation by phone, with limited walk-in seating available under the county’s statutes. Jordan Michelman, Los Angeles Times, 4 June 2021 Donald Trump's weird obsession with mail-in voting is doing collateral damage to GOP lawmakers' illiberal designs. Timothy Noah, The New Republic, 4 June 2021 Additionally, police were notified of a walk-in shooting victim around 12:46 a.m. at an area hospital. Phillip Jackson, baltimoresun.com, 3 June 2021 The reason why is a great lead-in to what the new team of scientists has helped to accomplish. Caroline Delbert, Popular Mechanics, 3 June 2021 It’s the walk-in sibling to outdoor dining space Craigie Next Door, where reservations are required. BostonGlobe.com, 1 June 2021 In an even more direct tie-in to Mare’s familial obsession, the final twist relies on Lori and John discovering the truth before Mare does, then hiding evidence and misleading the police to protect their son. Kathryn Vanarendonk, Vulture, 31 May 2021

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


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


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


1599, in the meaning defined at sense 1a


1764, in the meaning defined at sense 1

History and Etymology for in


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


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Time Traveler for in

Time Traveler

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

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Statistics for in

Last Updated

5 Jun 2021

Cite this Entry

“In.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/in. Accessed 13 Jun. 2021.

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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



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



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

chiefly US, informal : a way of becoming involved in something or of influencing someone
\ ˈin How to pronounce in (audio) , 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.


\ ˈin How to pronounce in (audio) \

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 How to pronounce in (audio) \

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.


Kids Definition of IN



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


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)




Medical Definition of In (Entry 2 of 2)


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Legal Definition of in

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

More from Merriam-Webster on in

Thesaurus: All synonyms and antonyms for in

Nglish: Translation of in for Spanish Speakers

Britannica English: Translation of in for Arabic Speakers

Britannica.com: Encyclopedia article about in


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