/ Dictionary / Index R rat-kangaroo: Meaning and Definition of Find definitions for: rat-kan•ga•roo Pronunciation: (rat'kang"gu-r"), [key] — pl. -roos. any of several rabbit-sized, ratlike Australian kangaroos of the subfamily Potoroinae. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rat-kangaroo (Thesaurus) ratite ratline Related Content Daily Word Quiz: lyceum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language