n. (pl. -ies) 1 a person who takes responsibility for another's performance of an undertaking, e.g. to appear in court, or payment of a debt. 2 archaic a certainty. of (or for) a surety archaic certainly. stand surety become a surety, go bail. suretyship n.
[ ME f. OF surté, surté f. L securitas -tatis SECURITY ]