/ Dictionary / Index N natural language: Meaning and Definition of Find definitions for: nat'ural lan'guage Pronunciation: [key] a language used as a native tongue by a group of speakers. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. natural killer cell natural law Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language