/ Dictionary / Index C cosmonautics: Meaning and Definition of Find definitions for: cos•mo•nau•tics Pronunciation: (koz"mu-nô'tiks, -not'iks), [key] — n. (used with a sing. v.) astronautics, esp. as applied to space flight. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. cosmonaut cosmopolis Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language