Meaning of “fifteen” - Learner’s Dictionary

fifteen

us uk /ˌfɪfˈtiːn/
She's only fifteen.We have fifteen guests invited.We've been together for fifteen years now.There are fifteen classes in all.We met fifteen years ago.

A1 the number 15

fifteenth

15th written as a word

(Definition of “fifteen” from the Cambridge Learner’s Dictionary © Cambridge University Press)