month /mʌnθ/noun 3forms 1phrases 2 noun3 •one of the 12 periods that make up a yearJuly is my favourite month. •A period of 30 days, 31 days, or some alternation thereof.We went on holiday for two months. •[in the plural] (no longer used) A woman's period; menstrual discharge.Sckenkius hath two other instances of two melancholy and mad women, so caused from the suppression of their months. — 1624 formsmonths Phrases with month month in, month outDuring every month; continuously. month of SundaysA very long time; a period regarded as too long.