from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The first month of the year in the Gregorian calendar. See Table at calendar.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. The first month of the Gregorian calendar, following the December of the previous year and preceding February. Abbreviation: Jan or Jan.
from the GNU version of the Collaborative International Dictionary of English
- n. The first month of the year, containing thirty-one days.
from The Century Dictionary and Cyclopedia
- n. The first month of the year, according to present and the later Roman reckoning, consisting of thirty-one days. Abbreviated Jan.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the first month of the year; begins 10 days after the winter solstice
Middle English Januarie, Jenever, from Old North French Jenever, from Latin Iānuārius (mēnsis), (month) of Janus, from Iānus, Janus; see ei- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
Re-Latinized from Middle English Ieneuer, from Anglo-Norman genever, from Latin iānuārius ("(month) of Janus"), perhaps from Proto-Indo-European base *ei-, "to go". (Wiktionary)