De ‧ cem ‧ ber /dɪˈsembə $ -ər/ BrE AmE noun [uncountable and countable] ( written abbreviation Dec. )
[ Date: 1200-1300 ; Language: Old French ; Origin: Latin , name of the tenth Roman month, from decem 'ten' ]
the 12th month of the year, between November and January
next/last December
Last December they visited Prague.
in December
We got married in December.
on December 6th
Jake’s birthday is on December 6th.
on 6th December British English :
The event was to take place on 6th December.
December 6 American English :
Her letter arrived December 6.