plural of Platonic month

(idiomatic) During every month; continuously.

One person's working time for a month, or the equivalent, used as a measure of how much work or labor is required or consumed to perform some task.

The period of duration from the first date of one month to the last date of the same month, which can thus vary from 28 to 31 days in length.

a period from one new moon until the next. / a synodic month of approximately 29.53 days, measured from a lunar phase until the return of that same phase.

a month of approximately 29.53 days, measured from a lunar phase until the return of that same phase. The long-term average duration is 29.530 588 days (29 d 12 h 44 min 2.8 s), or about 29 ½ days.

A month with an extra day in a leap year.

(astronomy) the interval between the moon's successive passing of the same moving node.

(euphemistic) Synonym of menstruation: the monthly period during which a fertile woman menstruates.

(idiomatic, informal) A very long time; a period regarded as too long.