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fifteen

[fif-teen]
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noun
  1. a cardinal number, ten plus five.
  2. a symbol for this number, as 15 or XV.
  3. a set of this many persons or things.
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adjective
  1. amounting to 15 in number.
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Origin of fifteen

before 900; Middle English, Old English fiftene. See five, -teen
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for fifteen

fifteen

noun
  1. the cardinal number that is the sum of ten and five
  2. a numeral, 15, XV, etc, representing this number
  3. something represented by, representing, or consisting of 15 units
  4. a rugby union football team
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determiner
    1. amounting to fifteenfifteen jokes
    2. (as pronoun)fifteen of us danced
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Word Origin

Old English fīftēne

Fifteen

noun
  1. the Fifteen British history the Jacobite rising of 1715
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for fifteen

n.

Old English fiftyne, from fif "five" (see five) + tyne (see -teen). Cf. Old Saxon fiftein, Old Frisian fiftine, Old Norse fimtan, Swedish femton, Dutch vijftien, German fünfzehn, Gothic fimftaihun "fifteen." French quinze, Italian quindici "fifteen" are from Latin quindecim (see Quatorze).

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Online Etymology Dictionary, © 2010 Douglas Harper