Definition of month

  1. month Noun A period into which a year is divided, historically based on the phases of the moon. In the Gregorian calendar there are twelve months: January, February, March, April, May, June, July, August, September, October, November and December.
  2. month Noun A period of 30 days, 31 days, or some alternation thereof.
  3. month Noun A woman's period; menstrual discharge.
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