noun (plural months) Etymology: Middle English, from Old English mōnath; akin to Old High German mānōd month, Old English mōna moon Date: before 12th century a measure of time corresponding nearly to the period of the moon's revolution and amounting to approximately 4 weeks or 30 days or 1/12 of a year, an indefinite usually extended period of time , one ninth of the typical duration of human pregnancy
