Entry 3 senses · 2 variants Webster, 1913 outspan · out·span · IPA v. t. & i. n. 01 v. t. & i. To unyoke or disengage, as oxen from a wagon; to unharness (a horse). 1. To unyoke or disengage, as oxen from a wagon; to unharness (a horse).[S. Africa] 02 n. The act of outspanning. 1. The act of outspanning. 2. A place where outspanning is done;[South African]