twelve /twelv/ BrE AmE number
[ Language: Old English ; Origin: twelf ]
the number 12 ⇨ dozen :
He received a twelve-month jail sentence.
Come at twelve (=12 o'clock) .
Their son Dylan is twelve (=12 years old) .
—twelfth adjective , pronoun :
her twelfth birthday
in the twelfth century
I’m planning to leave on the twelfth (=the 12th day of the month) .