Breadcrumb Home > Thesaurus > T Synonyms of trepan Find synonyms for: Noun 1. trepan, trephine, surgical instrument usage: a surgical instrument used to remove sections of bone from the skull 2. trepan, drill usage: a drill for cutting circular holes around a center Verb 1. trepan, bore, drill usage: cut a hole with a trepan, as in surgery WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of trepan (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language