/ Dictionary / Index F foolish: Meaning and Definition of Find definitions for: fool•ish Pronunciation: (f'lish), [key] — adj. resulting from or showing a lack of sense; ill-considered; unwise: a foolish action, a foolish speech. lacking forethought or caution. trifling, insignificant, or paltry. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: foolish (Thesaurus) fool hen foolproof Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language