The cardinal number occurring after fourteen (14) and before sixteen (16).

plural of fifteen

plural of fifteener

(UK, informal) A film assigned an age rating of 15, those under 15 not being permitted to view it. / (bibliography, informal) A book printed in the 15th century.

The property of being fifteen.

(UK, fandom slang) The practice of adding swearing to an English anime dub in order to get a higher age classification, which may attract more buyers.

The start of the sixteenth hour of the day on the 24-hour clock i.e. 15:00. / The number one thousand five hundred. / The year 1500.

Alternative spelling of 15 minutes

(colloquial, US, Canada) The amount of body weight (thought to be 15 pounds) gained by a student during their first year of college.

Synonym of quinceanera