/ Dictionary / Index S seventeen: Meaning and Definition of Find definitions for: sev•en•teen Pronunciation: (sev'un-tēn'), [key] — n. a cardinal number, 10 plus 7. a symbol for this number, as 17 or XVII. a set of this many persons or things. —adj. amounting to 17 in number. (cap., italics) a novel (1916) by Booth Tarkington. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: seventeen (Thesaurus) seven-spot seventeenth 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