Definition of December noun from the Oxford Advanced Learner's Dictionary

  

December

 noun
noun
BrE BrE//dɪˈsembə(r)//
 
; NAmE NAmE//dɪˈsembər//
 
[uncountable, countable](abbreviation Dec.)
 
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the 12th and last month of the year To see how December is used, look at the examples at April. Word Origin Middle English: from Latin, from decem ‘ten’ (being originally the tenth month of the Roman year).
See the Oxford Advanced American Dictionary entry: December