Source : Webster's Revised Unabridged Dictionary (1913)

Inside \In"side`\, n.
   1. The part within; interior or internal portion; content.

            Looked he o' the inside of the paper? --Shak.

   2. pl. The inward parts; entrails; bowels; hence, that which
      is within; private thoughts and feelings.

            Here's none but friends; we may speak Our insides
            freely.                               --Massinger.

   3. An inside passenger of a coach or carriage, as
      distinguished from one upon the outside. [Colloq. Eng.]

            So down thy hill, romantic Ashbourne, glides The
            Derby dilly, carrying three insides.  --Anti-Jacobin.

   {Patent insides} or {outside}, a name give to newspaper
      sheets printed on one side with general and miscellaneous
      matter, and furnished wholesale to offices of small
      newspapers, where the blank pages are filled up with
      recent and local news.

Inside \In"side`\, prep. or adv.
   Within the sides of; in the interior; contained within; as,
   inside a house, book, bottle, etc.

Inside \In"side`\, a.
   1. Being within; included or inclosed in anything; contained;
      interior; internal; as, the inside passengers of a
      stagecoach; inside decoration.

            Kissing with inside lip.              --Shak.

   2. Adapted to the interior.

   {Inside callipers} (Mech.), callipers for measuring the
      diameters of holes, etc.

   {Inside finish} (Arch.), a general term for the final work in
      any building necessary for its completion, but other than
      unusual decoration; thus, in joiner work, the doors and
      windows, inside shutters, door and window trimmings,
      paneled jams, baseboards, and sometimes flooring and
      stairs; in plaster work, the finishing coat, the cornices,
      centerpieces, etc.,; in painting, all simple painting of
      woodwork and plastering.

   {Inside track}, the inner part of a race course; hence,
      colloquially, advantage of place, facilities, etc., in
      competition.

Source : WordNet®

inside
     adv 1: within a building; "in winter we play inside" [syn: {indoors}]
            [ant: {outside}, {outside}]
     2: on the inside; "inside, the car is a mess" [syn: {within}]
        [ant: {outside}]
     3: with respect to private feelings; "inwardly, she was raging"
        [syn: {inwardly}] [ant: {outwardly}]
     4: in reality; "she is very kind at heart" [syn: {at heart}, {at
        bottom}, {deep down}, {in spite of appearance}]

inside
     n 1: the region that is inside of something [syn: {interior}]
          [ant: {outside}]
     2: the inner or enclosed surface of something [syn: {interior}]
        [ant: {outside}]

inside
     adj 1: relating to or being within or near the inner side or limit;
            "he reached into his inside jacket pocket"; "inside
            out"; "an inside pitch is between home plate and the
            batter" [ant: {outside}]
     2: being or applying to the inside of a building; "an inside
        wall" [syn: {inside(a)}]
     3: located, suited for, or taking place within a building;
        "indoor activities for a rainy day"; "an indoor pool"
        [syn: {indoor(a)}] [ant: {outdoor(a)}]
     4: confined to an exclusive group; "privy to inner knowledge";
        "inside information"; "privileged information" [syn: {inner},
         {privileged}]
     5: away from the outer edge; "an inner lane"; "the inside lane"
     6: within some bounds; especially of an organization; "an
        inside job"