/ Dictionary / Index N normal curve: Meaning and Definition of Find definitions for: nor'mal curve' Pronunciation: [key] — Statistics. Statistics. a bell-shaped curve showing a particular distribution of probability over the values of a random variable. Also calledCompare illus. under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. normal normalcy 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