/ Thesaurus / M Synonyms of may day Find synonyms for: Noun1. May Day, First of May, May 1, dayusage: observed in many countries to celebrate the coming of spring; observed in Russia and related countries in honor of laborNoun1. May Day, First of May, May 1, dayusage: an internationally recognized distress signal via radiotelephone (from the French m'aider)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: punctual Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language