/ Dictionary / Index P pitiless: Meaning and Definition of Find definitions for: pit•i•less Pronunciation: (pit'i-lis, pit'ē-), [key] — adj. feeling or showing no pity; merciless: pitiless criticism of his last novel. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pitiless (Thesaurus) pitiful pitman 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