/ ˌfɪfˈtiːn; NAmE /
1.
number 15
2.
noun a team of Rugby Union players :
He's in the first fifteen.
► fif·teenth / ˌfɪfˈtiːnθ; NAmE / ordinal number , noun
HELP NOTE : There are examples of how to use ordinal numbers at the entry for fifth .
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WORD ORIGIN
Old English fīftēne , fīftīene (from five and -teen ).