/ Dictionary / Index R random variable: Meaning and Definition of Find definitions for: ran'dom var'iable Pronunciation: [key] — Statistics. Statistics. a quantity that takes any of a set of values with specified probabilities. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. random sampling random walk Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language