1848, "a period when business is down," from off- (adj.) (see off (prep.)) + season (n.).

"white with a tinge of gray or yellow;" as an adjective, "almost the same as white," 1927, from off (prep.) + white (n.).

"unawares," by 1936, American English, from off (adv.) + base (n.); a figurative extension from baseball sense of a runner being "not in the right position" (1882) and vulnerable to being picked off.

1733, "comfortable," from well (adv.) + off. Meaning "prosperous, not poor" is recorded from 1849.

also tradeoff, "sacrifice of one benefit for another," 1959, from verbal phrase to trade off; see trade (v.) + off (adv.).

"used, meant to be used, or taking place away from roads," 1949, from off- (adj.) (see off (prep.)) + road.

"act of pushing off" (a boat, from the land), 1902, from the verbal phrase; see push (v.) + off (adv.).

1901 in reference to information, from tip (v.2) + off (adv.). From 1924 in basketball, from tip (v.3).

also faceoff, 1886 in sports (hockey, etc., originally lacrosse), from verbal phrase in a sports sense, attested from 1867 (see face (v.) + off (adv.)); the off perhaps is based on stand-off or similar constructions.

"removable by lifting," 1907, from the verbal phrase, from lift (v.) + off (adv.)