Added 9 October 2026 christmas noun Categories: TimeEveryday Words noun ! Definition from WordNet 3.1, Princeton University. More about christmas at Wordnik → Where our words come from → Period extending from Dec. 24 to Jan. 6. A Christian holiday celebrating the birth of Christ; a quarter day in England, Wales, and Ireland. Related Words: christmastideyulechristmastimeyuletidexmasnoelholidayevesantanoël Back to today's word