/ Dictionary / Index H Hallowmas: Meaning and Definition of Find definitions for: Hal•low•mas Pronunciation: (hal'ō-mus, -mas"), [key] — n. the feast of Allhallows or All Saints' Day, on November 1. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: hallowmas (Thesaurus) Halloween halloysite Related Content Daily Word Quiz: coincidence Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language