six ‧ teen /ˌsɪkˈstiːn◂/ BrE AmE number
[ Language: Old English ; Origin: sixtiene , from six 'six' + tien 'ten' ]
the number 16:
sixteen years later
He moved to London when he was sixteen (=16 years old) .
—sixteenth adjective , pronoun :
her sixteenth birthday
the sixteenth century
Let’s have dinner on the 16th (=the 16th day of the month) .