Tester \Tes"ter\, n. [OE. testere a headpiece, helmet, OF. testiere, F. t[^e]ti[`e]re a head covering, fr. OF. teste the head, F. t[^e]te, fr. L. testa an earthen pot, the skull. See {Test} a cupel, and cf. {Testi[`e]re}.] 1. A headpiece; a helmet. [Obs.] [1913 Webster] The shields bright, testers, and trappures. --Chaucer. [1913 Webster] 2. A flat canopy, as over a pulpit or tomb. --Oxf. Gross. [1913 Webster] 3. A canopy over a bed, supported by the bedposts. [1913 Webster] No testers to the bed, and the saddles and portmanteaus heaped on me to keep off the cold. --Walpole. [1913 Webster]