Webster's Revised Unabridged Dictionary · 1913

outspan

outspan , verb, transitive and intransitive

[Dutch uitspannen.]

To unyoke or disengage, as oxen from a wagon; to unharness (a horse). [S. Africa]

outspan , noun

1.
The act of outspanning.
2.
A place where outspanning is done;
An encampment. [South African]