a pivoted piece that holds the hammer at full cock or half cock in the firing mechanism of small arms.
Origin: 1550–60; < Middle Frenchserre a grip, derivative of serrer to lock up, close < Vulgar Latin*serrāre, for Late Latinserāre to bar (a door), derivative of Latinsera door-bar; Vulgar Latin-rr- unexplained
O.E. searian "dry up, to whither," from P.Gmc. *saurajan, from root of sear "dried up, withered" (see sere). Meaning "to brand, to burn by hot iron" is recorded from 1530; fig. use is from 1582.