Source : Webster's Revised Unabridged Dictionary (1913)

Outside \Out"side`\, n.
   1. The external part of a thing; the part, end, or side which
      forms the surface; that which appears, or is manifest;
      that which is superficial; the exterior.

            There may be great need of an outside where there is
            little or nothing within.             --South.

            Created beings see nothing but our outside.
                                                  --Addison.

   2. The part or space which lies without an inclosure; the
      outer side, as of a door, walk, or boundary.

            I threw open the door of my chamber, and found the
            family standing on the outside.       --Spectator.

   3. The furthest limit, as to number, quantity, extent, etc.;
      the utmost; as, it may last a week at the outside.

   4. One who, or that which, is without; hence, an outside
      passenger, as distinguished from one who is inside. See
      {Inside}, n. 3. [Colloq. Eng.]

Outside \Out"side`\, a.
   1. Of or pertaining to the outside; external; exterior;
      superficial.

   2. Reaching the extreme or farthest limit, as to extent,
      quantity, etc.; as, an outside estimate. [Colloq.]

   {Outside finish} (Arch.), a term for the minor parts, as
      corner boards, hanging stiles, etc., required to complete
      the exterior of a wooden building; -- rare in masonry.

Outside \Out"side`\, adv.
   or prep. On or to the outside (of); without; on the exterior;
   as, to ride outside the coach; he stayed outside.

Source : WordNet®

outside
     adj 1: relating to or being on or near the outer side or limit; "an
            outside margin" [ant: {inside}]
     2: coming from the outside; "extraneous light in the camera
        spoiled the photograph"; "relying upon an extraneous
        income"; "disdaining outside pressure groups" [syn: {external},
         {extraneous}]
     3: originating or belonging beyond some bounds:"the outside
        world"; "outside interests"; "an outside job"
     4: located, suited for, or taking place in the open air;
        "outdoor clothes"; "badminton and other outdoor games"; "a
        beautiful outdoor setting for the wedding" [syn: {outdoor(a)},
         {out-of-door}] [ant: {indoor(a)}]
     5: functioning outside the boundaries or precincts of an
        organized unit; "extramural hospital care and treatment";
        "extramural studies"
     6: leading to or from the outside; "an outside door" [syn: {outside(a)}]
     7: from or between other countries; "external commerce";
        "international trade"; "developing nations need outside
        help" [syn: {external}, {international}, {outside(a)}]
     8: maximal in amount; "a maximal amount"; "an outside estimate"
        [syn: {largest}]
     9: very unlikely; "an outside chance"; "a remote possibility";
        "a remote contingency" [syn: {remote}]
     10: on or toward an outer edge; "an outer lane"; "the outside
         lane"
     11: (of a baseball pitch) on the far side of home plate from the
         batter; "the pitch was away (or wide)"; "an outside
         pitch" [syn: {away}]

outside
     n 1: the region that is outside of something [syn: {exterior}]
          [ant: {inside}]
     2: the outer side or surface of something [syn: {exterior}]
        [ant: {inside}]
     adv 1: outside a building; "in summer we play outside" [syn: {outdoors},
             {out of doors}, {alfresco}] [ant: {inside}, {inside}]
     2: on the outside; "outside, the box is black" [ant: {inside}]