/ Thesaurus / O Synonyms of off day Find synonyms for: Noun1. off-day, dayusage: a day when things go poorly; "I guess this is one of my off-days"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language