Entry 2 senses · 2 variants Webster, 1913 Custrel /(kŭs"trel)/ · Cus·trel · IPA /ˈkʌstɹəl/ n. n. 01 n. An armor-bearer to a knight. 1. An armor-bearer to a knight.[Obs.] 02 n. See Costrel. 1. See Costrel.[Obs.] See: Costrel