Back"set` (-sĕt`), n. [Back,
adv. + set.] 1. A check; a relapse; a
discouragement; a setback.
2. Whatever is thrown back in its course, as
water.
Slackwater, or the backset caused by the
overflow.
Harper's Mag.
Back"set`, v. t. To plow again, in the
fall; -- said of prairie land broken up in the spring. [Western
U.S.]