| Officiate 1. (v. i.) To act as an officer or referee in performing a duty; to transact the business of an office or public trust; to conduct a public service. 2. (v. t.) To discharge, perform, or supply, as an official duty or function. Thesaurus Entries act, act as, adjudicate, administer, administer the Eucharist, administrate, anoint, arbitrate, chair, chairman, chrism, conduct, confirm, direct, do duty, function, head up, hear, hold court, hold the scales, impose, judge, lay hands on, lead, manage, mediate, minister, moderate, occupy the chair, oversee, perform a rite, perform as, perform service, preside, preside over, referee, run, serve, sit in judgment, superintend, supervise, try, umpire |