- outside
- 1505 (n.), "outer side," from out + side (q.v.). The adj. is attested from 1634; the prep. from 1826; the adv. from 1813. Outsider is first attested 1800; fig. sense of "a person isolated from conventional society" is first recorded 1907. The sense of race horses "outside" the favorites is from 1836; hence outside chance (1909).