Added 9 October 2026 january noun Categories: TimeEveryday Words noun ! Definition from WordNet 3.1, Princeton University. More about january at Wordnik → Where our words come from → The first month of the year; begins 10 days after the winter solstice. Related Words: janjuneseptemberapriljulynovemberdecemberoctoberfebruarymonthmid-januaryjun Back to today's word