What is the Latin word for outside?

The usual Latin words for “outside” are frōns, speciēs. The right choice depends on the sense; see the distinctions below.

English → Latin

“outside” in Latin

frōnsthe forehead, brow, front; the brow or countenance as an indicator of the feelings; as the mirror of a person's characte speciēsseeing, view, look; spectacle, sight; external appearance, looks; general outline or shape

Riddle & Arnold A Copious and Critical English–Latin Lexicon, 1864

outside

frons (the front): pars exterior (outer part): forma externa (outward shape): species (outward appearance). The glittering outside of a thing, splendor et species alicujus rei: to judge anything by the outside, forma externa metiri aliquid; omnia referre or revocare ad speciem or ad formam externam.

Quick answer

What is the Latin word for outside?: The usual Latin words for “outside” are frōns, speciēs. The right choice depends on the sense; see the distinctions below.

Entry from J. E. Riddle & T. K. Arnold, A Copious and Critical English–Latin Lexicon (rev. C. Anthon, New York: Harper, 1864), digitised by Fergus J. P. Walsh, CC BY-SA 4.0; Latin markup adapted by latindictionary.co.