/ Dictionary / Index S sedation: Meaning and Definition of Find definitions for: se•da•tion Pronunciation: (si-dā'shun), [key] — n. Med. the calming of mental excitement or abatement of physiological function, esp. by the administration of a drug. the state so induced. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sedation (Thesaurus) sedate sedative Related Content Daily Word Quiz: neologism Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language