Entry 1 sense Webster, 1913 Probationary /prōb-āsh'-ən-ĕrˌ-ēˌ/ · Pro·ba·tion·a·ry · IPA /proʊbˈeɪʃənˌɛrˌiː/ 01 a. Of or pertaining to probation; serving for trial. 1. Of or pertaining to probation; serving for trial. “To consider this life . . . as a probationary state.” — Paley.