/ Dictionary / Index C call number: Meaning and Definition of Find definitions for: call' num"ber Pronunciation: [key] — Library Science. Library Science. a number, letter, symbol, or combination of these, indicating the specific location of a work in a library, esp. the combination of the classification symbol and the designation for the author. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. call money call of nature Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language