Tōc'sin, n.

n. [Fr., from O. Fr. toquer, to touch, strike, and sein, seint, a bell, Pr. cenh, Pg. sino, O. It. segno, L. Lat. signum, from Lat. signum, a sign, signal. See TOUCH and TOCCATA.] An alarm-bell, or the ringing of a bell for the purpose of alarm. The loud tocsin tolled their last alarm. Campbell.