/ Dictionary / Index I infrequency: Meaning and Definition of Find definitions for: in•fre•quen•cy Pronunciation: (in-frē'kwun-sē), [key] — n. state of being infrequent. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: infrequency (Thesaurus) infrastructure infrequent Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language