• synonyms


[preposition in-sahyd, in-sahyd; adverb in-sahyd; noun in-sahyd; adjective in-sahyd, in-, in-sahyd]
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  1. on the inner side or part of; within: inside the circle; inside the envelope.
  2. prior to the elapse of; within: He promised to arrive inside an hour.
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  1. in or into the inner part: Please go inside.
  2. indoors: They play inside on rainy days.
  3. within one's heart, reason, etc.; by true nature; basically: I know inside that he's not guilty. Inside, she's really very shy.
  4. Slang. in prison.
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  1. the inner or internal part; interior: the inside of the house.
  2. the inner side or surface: the inside of the hand; He pinned the money to the inside of his jacket.
  3. Usually insides. Informal. the inner parts of the body, especially the stomach and intestines: The coffee scalded my insides.
  4. a select or inner circle of power, prestige, etc.: a man on the inside.
  5. the shortest of several parallel, curving tracks or lanes; the part of an oval track closest to the inner rail: The horse came up fast on the inside.
  6. the inward nature, mind, feelings, etc.
  7. Slang. confidential or secret information.
  8. an inside passenger or place in a coach, carriage, etc.
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  1. situated or being on or in the inside; interior; internal: an inside seat.
  2. acting, employed, done, or originating within a building or place: He used to work on the dock but now he has an inside job.
  3. derived from the inner circle of those concerned in and having private knowledge of a situation: inside information.
  4. Baseball. (of a pitched ball) passing between home plate and the batter: The pitch was low and inside.
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  1. inside of, Informal. within the space or period of: Our car broke down again inside of a mile.
  2. inside out,
    1. with the inner side reversed to face the outside.
    2. thoroughly; completely: She knew the work inside out.
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Origin of inside

Middle English word dating back to 1350–1400; see origin at in, side1

Synonyms for inside

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7. Inside, interior both refer to the inner part or space within something. Inside is a common word, and is used with reference to things of any size, small or large: the inside of a pocket. Interior, somewhat more formal, denotes the inner part or the space or regions within; it usually suggests considerable size or extent, and sometimes a richness of decoration: the interior of a country, of the earth, of a cathedral.

Antonyms for inside

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Related Words for inside

indoors, interior, innards, central, limited, classified, closet, private, exclusive, heart, stuffing, recess, center, soul, belly, gut, bowels, contents, breast, womb

Examples from the Web for inside

Contemporary Examples of inside

Historical Examples of inside

  • If they have to stroke 'em they do it plenty gingerly and you can see 'em shudderin' inside like.

    The Spenders

    Harry Leon Wilson

  • So he lay down in the coffin but no sooner was he inside when bang!

    Ancient Man

    Hendrik Willem van Loon

  • All you had to do when you got it inside a man was to turn it round a bit, and the wound gaped and tore.


    William J. Locke

  • The inside of the church was then burnt, and hardly one escaped.

    The Grand Old Man

    Richard B. Cook

  • Inside the house she heard the persistent, energetic sound of hammering.

British Dictionary definitions for inside


noun (ˈɪnˈsaɪd)
  1. the interior; inner or enclosed part or surface
  2. the side of a path away from the road or adjacent to a wall
  3. (also plural) informal the internal organs of the body, esp the stomach and bowels
  4. inside of in a period of time less than; within
  5. inside out with the inside facing outwards
  6. know something inside out to know something thoroughly or perfectly
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preposition (ˌɪnˈsaɪd)
  1. in or to the interior of; within or to within; on the inside of
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adjective (ˈɪnˌsaɪd)
  1. on or of an interior; on the insidean inside door
  2. (prenominal) arranged or provided by someone within an organization or building, esp illicitlythe raid was an inside job; inside information
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adverb (ˌɪnˈsaɪd)
  1. within or to within a thing or place; indoors
  2. by nature; fundamentallyinside, he's a good chap
  3. slang in or into prison
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for inside


late 14c., ynneside "interior of the body," compound of in (adv.) + side (n.). The adjective is 1610s, from the noun. Inside job "robbery, espionage, etc., committed by or with the help of a resident or servant of a place" is attested by 1887, American English (also, late 19c., early 20c., "indoors work"). Inside track "advantage" is metaphoric because those lanes are shorter on a curved track. Inside of, in reference to time, is from 1839.

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Online Etymology Dictionary, © 2010 Douglas Harper

Idioms and Phrases with inside


In addition to the idioms beginning with inside

  • inside of
  • inside out
  • inside track, the

also see:

  • on the inside
  • step in (inside)
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The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.