/ Dictionary / Index R reptilian: Meaning and Definition of Find definitions for: rep•til•i•an Pronunciation: (rep-til'ē-un, -til'yun), [key] — adj. belonging or pertaining to the Reptilia. groveling, debased, or despicable; contemptible. mean; treacherous; harmful. —n. a reptile. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: reptilian (Thesaurus) Reptilia Repub. 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