• IPA: /ˈɪnsaɪd/, /ɪnˈsaɪd/

inside (plural insides)

  1. The interior or inner part.
    • 1613, William Shakespeare; [John Fletcher], “The Famous History of the Life of King Henry the Eight”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: Printed by Isaac Iaggard, and Ed[ward] Blount, published 1623, OCLC 606515358 ↗, [Act III, scene ii]:
      Looked he o' the inside of the paper?
    The inside of the building has been extensively restored.
  2. The left-hand side of a road if one drives on the left, or right-hand side if one drives on the right.
    On a motorway, you should never pass another vehicle on the inside.
  3. The side of a curved road, racetrack etc. that has the shorter arc length; the side of a racetrack nearer the interior of the course or some other point of reference.
    The car in front drifted wide on the bend, so I darted up the inside to take the lead.
  4. (colloquial) (in the plural) The interior organs of the body, especially the guts.
    Eating that stuff will damage your insides.
  5. (dated, UK, colloquial) A passenger within a coach or carriage, as distinguished from one upon the outside.
    • So down thy hill, romantic Ashbourne, glides / The Derby dilly, carrying three insides.
    • , Charles Dickens, The Pickwick Papers
      So, what between Mr. Dowler's stories, and Mrs. Dowler's charms, and Mr. Pickwick's good humour, and Mr. Winkle's good listening, the insides contrived to be very companionable all the way.
Translations Translations
  • Russian: нутро́


  1. Of or pertaining to the inner surface, limit or boundary.
    The inside surface of the cup is unpainted.
  2. Nearer to the interior or centre of something.
    Because of the tighter bend, it's harder to run in an inside lane.
    All the window seats were occupied, so she took an inside seat.
    • 2003, Timothy Noakes, Lore of Running, Human Kinetics (ISBN 9780873229593), page 731:
      As the centripetal force is an inverse function of the radius of the curve, it follows that the runner in the outside lane will be less affected than the runner in the inside lane.
  3. Originating from, arranged by, or being someone inside an organisation.
    The reporter had received inside information about the forthcoming takeover.
    The robbery was planned by the security guard: it was an inside job.
    They wanted to know the inside story behind the celebrity's fall from grace.
    • 2011, G. M. Lucas, An Unsung Quartet, iUniverse (ISBN 9781450274234), page 210:
      “They have an inside man at the base, so I didn't want to alert him. If their inside man called Mr. C about us locating the C-4, I doubt you and Gail would still be alive.”
  4. (of a person) Legally married to or related to (e.g. born in wedlock to), and/or residing with, a specified other person (parent, child, or partner); (of a marriage, relationship, etc) existing between two such people.
    Antonyms: outside
    • 1974, Michael Garfield Smith, The Plural Society in the British West Indies, Univ of California Press (ISBN 9780520027794), page 235:
      But the terms normally used to distinguish a man's resident and absent children are "inside" and "outside," the reference being to the home where the common father dwells. Only rarely will a man describe his "inside" children born out of out of wedlock as "lawful," [...]
    • 2008, Miriam Koktvedgaard Zeitzen, Polygamy: A Cross-Cultural Analysis, A&C Black (ISBN 9781845202217), page 158:
      An 'outside wife' has limited social recognition and status because her husband typically refuses to declare her publicly as his wife. She also has much less social and politico-jural recognition than an 'inside wife' [...]
    • 2014, Alison Miller, Becoming Yourself: Overcoming Mind Control and Ritual Abuse, Karnac Books (ISBN 9781781813508), page 185:
      [The person] who was going to visit her with his wife had a physical resemblance to the abuser, so some of her inside children had a strong reaction of fear and revulsion to him. They were afraid to look at the face of the guest in case he was the abuser.
  5. (baseball, of a pitch) Toward the batter as it crosses home plate.
    The first pitch is ... just a bit inside.
  6. At or towards or the left-hand side of the road if one drives on the left, or right-hand side if one drives on the right.
    the inside lane of the motorway
Antonyms Related terms Translations Adverb


  1. Within or towards the interior of something; within the scope or limits of something (a place), especially a building.
    It started raining, so I went inside.
    The secretive residents of the massive city-ship tended to stay inside.
    1. (colloquial) In or to prison.
      He spent ten years inside, doing a stretch for burglary.
  2. Indoors.
    It was snowing, so the children stayed inside.
  3. Intimately, secretly; without expressing what one is feeling or thinking.
    Are you laughing at us inside?
Translations Translations Preposition
  1. Within the interior of something, closest to the center or to a specific point of reference.
    He placed the letter inside the envelope.
  2. Within a period of time.
    The job was finished inside two weeks.

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