n. (Abbr. Dec.)
The 12th month of the year in the Gregorian calendar.
[Middle English decembre, from Old French, from Latin December, the tenth month of the Roman year, probably from *decemmembris, from *decem-mēnsris : decem, ten + mēnsis, month; see menses.]
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
