/ Dictionary / Index L Low Mass: Meaning and Definition of Find definitions for: Low' Mass' Pronunciation: [key] a Mass that is said, and not sung, by the celebrant, who is assisted by one server, and which has less ceremonial form than a High Mass, using no music or choir. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. low-lying low milling Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language