Webster's Revised Unabridged Dictionary · 1913

Outside

Outside , noun

1.
The external part of a thing; the part, end, or side which forms the external 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 beyond the external edge of a structure or beyond the boundary of an inclosure.
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. [Colloquial English]
5.
The part of the world not encompassed by or under control of an organization or institution; as, prisoners are not allowed to pass objects to persons on the outside; one may not discuss company secretes with anyone on the outside.

Outside , adjective

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. [Colloquial]
Collocations (1)
Outside finish (Architecture) , 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 , adverb

On or to the outside (of); without; on the exterior; as, to ride outside the coach; he stayed outside.