/ Dictionary / Index I infimum: Meaning and Definition of Find definitions for: in•fi•mum Pronunciation: (in-fī'mum, -fē'-), [key] — n. Math. SeeAbbr.: inf Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. infiltrometer infin. Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language