/ Dictionary / Index I informality: Meaning and Definition of Find definitions for: in•for•mal•i•ty Pronunciation: (in"fôr-mal'i-tē), [key] — pl. -ties the state of being informal; absence of formality. an informal act. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: informality (Thesaurus) informal informant Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language