Back"set` (?), 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.
© Webster 1913.
Back"set`, v. i.
To plow again, in the fall; -- said of prairie land broken up in the spring.
[Western U.S.]
© Webster 1913.