noticed no·ti·ced UK/ˈnəʊ.tɪst/ US/ˈnoʊ.tɪst/ common adjective 1. being perceived or observed “an easily noticed effect on the rate of growth” Antonymsunnoticed Similardetected WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.