/ Dictionary / Index C Cousteau: Meaning and Definition of Find definitions for: Cous•teau Pronunciation: (k-stō'), [key] born 1910, French naval officer, author, and underseas explorer: developed the Aqua-Lung. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: cousteau (Thesaurus) cousinry Cousy Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language