/ Dictionary / Index S sextant: Meaning and Definition of Find definitions for: sex•tant Pronunciation: (sek'stunt), [key] — n. an astronomical instrument used to determine latitude and longitude at sea by measuring angular distances, esp. the altitudes of sun, moon, and stars. (cap.)the constellation Sextans. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sextant (Thesaurus) Sextans sextern Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language