/ Dictionary / Index R ridiculous: Meaning and Definition of Find definitions for: ri•dic•u•lous Pronunciation: (ri-dik'yu-lus), [key] — adj. causing or worthy of ridicule or derision; absurd; preposterous; laughable: a ridiculous plan. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: ridiculous (Thesaurus) ridicule riding Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language