A period into which a year is divided, historically based on the phases of the moon. / A period of 30 days, 31 days, or some alternation thereof.

(obsolete) A woman's period; menstrual discharge.

plural of month

plural of monthful

A quantity that lasts or occurs throughout a 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.