Synonyms for outside

modified

1. Outermost

   extreme, farthest, apart from, external, away from, farther; see also furthest.

2. Exterior

   outdoor, external, outward; see outer.

   Antonyms inner, inside, interior.

noun

1. An outer surface

   exterior, outer side, surface, integument, covering, sheath, shell, façade, topside, upper side, front side, face, appearance, outer aspect, seeming; see also body 4, cover 1, 2, skin.

   Antonyms interior, inside*, inner side.

2. The limit

   outline, border, bounds; see boundary, edge 1, end 4.

at the outside