Entry 1 sense Webster, 1913 Hypocoristic · Hyp·o·co·ris·tic · IPA /ˌhaɪ.pə.kəˈɹɪs.tɪk/ 01 a. Endearing; diminutive; as, the hypocoristic form of a name. 1. Endearing; diminutive; as, the hypocoristic form of a name. “The hypocoristic or pet form of William.” — Dr. Murray.