Offset
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
A deduction; a counterclaim; a contrary claim or demand by which a given claim may be lessened or cancoled.
See Leonard v. Charter Oak L. Ins. Co., 65 Conn. 529, 33 Atl. 511; Cable Flax Mills v. Early, 72 App. Div. 213, 76 N. Y. Supp. 191.
The more usual form of the word is "set-off," (Q. v.)