- irregular: independent in behavior or thought; "she led a somewhat irregular private life"; "maverick politicians"
- breaking with convention or tradition; "an unorthodox lifestyle"
- (unorthodoxy) any opinions or doctrines at variance with the official or orthodox position
- (unorthodoxy) heresy: a belief that rejects the orthodox tenets of a religion
- Unorthodox is the second full-length studio album by the Swedish death metal band Edge of Sanity. It was recorded in between December 1991 and January 1992 with Tomas Skogsberg and released by Black Mark Records on July 8, 1992.
- Unorthodox are a doom metal band from Maryland.
- unusual, unconventional, or idiosyncratic
- Unconventional, unaccepted; the opposite of Orthodox, q.v.
- Descriptive of a one-day batsman who hits short ball on leg-side to leg, rather than employing the now-standard double hop down the pitch, 270 degree turn with pike before balancing on one knee and potting the ball to third man with the handle-end of his bat used as if it were a snooker cue.