1. a cardinal number, 10 plus 7.
  2. a symbol for this number, as 17 or XVII.
  3. a set of this many persons or things.


  1. amounting to 17 in number.
  2. (initial capital letter, italics) a novel (1916) by Booth Tarkington.


  1. the cardinal number that is the sum of ten and seven and is a prime numberSee also number (def. 1)
  2. a numeral, 17, XVII, etc, representing this number
  3. the amount or quantity that is seven more than ten
  4. something represented by, representing, or consisting of 17 units


    1. amounting to seventeenseventeen attempts
    2. (as pronoun)seventeen were sold

late Old English seofontyne; see seven + -teen. Replacing Old English form seofon-teoða. Cf. German siebzehn, a contraction of Middle High German siben-zehen.

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