/ Dictionary / Index R rudimentary: Meaning and Definition of Find definitions for: ru•di•men•ta•ry Pronunciation: (r"du-men'tu-rē, -trē), [key] — adj. pertaining to rudiments or first principles; elementary: a rudimentary knowledge of geometry. of the nature of a rudiment; undeveloped or vestigial. primitive. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rudimentary (Thesaurus) rudiment Rudny Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language