/ Dictionary / Index C call of nature: Meaning and Definition of Find definitions for: call' of na'ture Pronunciation: [key] — Informal. Informal. a need to urinate or defecate. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. call number Call of the Wild, The* 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