Entry 3 senses · 2 variants Webster, 1913 Customary /(kŭs"tŭm*ā̇*ry̆)/ · Cus·tom·a·ry · IPA /ˈkʌs.təˌmɛɹ.i/ a. n. 01 a. Agreeing with, or established by, custom; established by common usage; conventional; habitual. 1. Agreeing with, or established by, custom; established by common usage; conventional; habitual. “Even now I met him With customary compliment.” — Shak. “A formal customary attendance upon the offices.” — South. 2. Holding or held by custom; as, customary tenants; customary service or estate.(Law) 02 n. A book containing laws and usages, or customs; as, the Customary of the Normans. 1. A book containing laws and usages, or customs; as, the Customary of the Normans.