Entry 1 sense Webster, 1913 Rhadamanthine · Rhad·a·man·thine · IPA /ˌɹædəˈmænθaɪn/ 01 a. Of or pertaining to Rhadamanthus; rigorously just; as, a Rhadamanthine judgment. 1. Of or pertaining to Rhadamanthus; rigorously just; as, a Rhadamanthine judgment.