Entry 2 senses · 2 variants Webster, 1913 Obdure /(ŏb*dūr")/ · Ob·dure · IPA v. t. a. 01 v. t. To harden. 1. To harden.[Obs.] 02 a. Obdurate; hard. 1. Obdurate; hard.[Obs.] “This saw his hapless foes, but stood obdured.” — Milton.