December
Americannoun
noun
Usage
What is December? December is the twelfth month of the year in the Gregorian calendar. It has 31 days and is between November and January. In the Northern Hemisphere, winter begins in December, while in the Southern Hemisphere, summer begins. A solstice happens in December, often marked on December 21, although the actual day may be December 20, 21, or 22. A solstice is when the sun is the farthest from the Earth’s celestial equator. The Southern Hemisphere experiences its summer solstice, with the sun reaching the southernmost point on the celestial sphere. Naturally, the Northern Hemisphere experiences its winter solstice. Many holidays are celebrated in December, including the Budhhist Bodhi Day, the Jewish Hanukkah (though it can start in November), the Christian Christmas, and the African American Kwanzaa. Kwanzaa is a cultural holiday, while Bodhi Day, Hanukkah, and Christmas are religious holidays, though many people celebrate Hanukkah and Christmas as cultural holidays. Example: December is my favorite month because I can finally take some time off work and be with my family.
Etymology
Origin of December
before 1000; Middle English decembre < Old French < Latin december (stem decembr- ) the tenth month of the early Roman year, apparently < *dec ( em ) -membri-, equivalent to decem ten + *-membri- < mens- month + -ri- suffix (with -sr- > -br- and assimilation of nasal)
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Its rival Anthropic has blown past it since December thanks to the wild success of its agentic coding assistant, Claude Code.
From Los Angeles Times • Jun. 10, 2026
Last December, however, Williams reentered the agency’s drug-testing pool, a move that led to speculation about a possible return for the 23-time Grand Slam singles champion.
From Los Angeles Times • Jun. 9, 2026
The EU said it began its investigation, in December 2025, after Meta banned third-party general-purpose AI assistants from the WhatsApp for Business API.
From BBC • Jun. 9, 2026
That’s a 3.2% increase compared with a year ago and the highest annual rate since December 2025, though the overall level remains low.
From Barron's • Jun. 9, 2026
HOLOLIBRARIAN: From January 1, 1990, to December 31, 1999, coordinates 39.605829, -75.718580 were as follows.
From "The First State of Being" by Erin Entrada Kelly
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
