four ‧ teen /ˌfɔːˈtiːn◂ $ ˌfɔːr-/ BrE AmE number
[ Language: Old English ; Origin: feowertiene , from feower 'four' + tien 'ten' ]
the number 14:
He used to work fourteen hours a day.
I started playing the guitar when I was fourteen (=14 years old) .
—fourteenth adjective , pronoun :
in the fourteenth century
my fourteenth birthday
I’m planning to leave on the fourteenth (=the 14th day of the month) .