whish UK/ˈwɪʃ/ US/ˈwɪʃ/ uncommon obsolete verb 1. make a sibilant sound 2. move with a whishing sound “The car whished past her” Related words Broader terms travelsound WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved.