1. [n]  the outer side or surface of something
2. [n]  the region that is outside of something
3. [adv]  outside a building; "in summer we play outside"
4. [adv]  on the outside; "outside, the box is black"
5. [adj]  (of a baseball pitch) on the far side of home plate from the batter; "the pitch was away (or wide)"; "an outside pitch"
6. [adj]  originating or belonging beyond some bounds:"the outside world"; "outside interests"; "an outside job"
7. [adj]  on or toward an outer edge; "an outer lane"; "the outside lane"
8. [adj]  functioning outside the boundaries or precincts of an organized unit; "extramural hospital care and treatment"; "extramural studies"
9. [adj]  coming from the outside; "extraneous light in the camera spoiled the photograph"; "relying upon an extraneous income"; "disdaining outside pressure groups"
10. [adj]  very unlikely; "outside chance"; "remote possibility"
11. [adj]  maximal in amount; "a maximal amount"; "an outside estimate"
12. [adj]  located, suited for, or taking place in the open air; "outdoor clothes"; "badminton and other outdoor games"; "a beautiful outdoor setting for the wedding"
13. [adj]  relating to or being on or near the outer side or limit; "an outside margin"

Outside
When Molly sneaks out of a basement window she finds that life as an outdoor cat is nothing like she had expected

more details ...

1. \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.]
   

2. \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.
   

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