/ Dictionary / Index S sixth: Meaning and Definition of Find definitions for: sixth Pronunciation: (siksth), [key] — adj. next after the fifth; being the ordinal number for six. being one of six equal parts. —n. a sixth part, esp. of one (). the sixth member of a series. a tone on the sixth degree from a given tone (counted as a first). the interval between such tones. the harmonic combination of such tones. —adv. in the sixth place; sixthly. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: sixth (Thesaurus) sixteenth rest Sixth Amendment Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language