/ Dictionary / Index Q quaternity: Meaning and Definition of Find definitions for: qua•ter•ni•ty Pronunciation: (kwu-tûr'ni-tē), [key] — pl. -ties. a group or set of four. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: quaternity (Thesaurus) quaternion Quathlamba Related Content Daily Word Quiz: stringent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language