/ Dictionary / Index I inaptitude: Meaning and Definition of Find definitions for: in•ap•ti•tude Pronunciation: (in-ap'ti-td", -tyd"), [key] — n. lack of aptitude; unfitness. unskillfulness; lack of dexterity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: inaptitude (Thesaurus) inapt inarch Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language