monosemy mo·no·semy UK/ˈmɒ.nə(ʊ)ˌsiː.mi/ uncommon literary noun 1. having a single meaning (absence of ambiguity) usually of individual words or phrases Antonymspolysemy Related words Broader terms clarity WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved.