bay window bay·win·dow uncommon noun 1. slang terms for a paunch Synonymspotpotbellybay windowcorporationtummy 2. a window that sticks out from the outside wall of a house Synonymsbay windowbow window Related words Broader terms windowbelly Narrower terms oriel WordNet 2.1 (Princeton University). WordNet 2.1 Copyright Princeton University. All rights reserved.
