Month (noun)

1. A unit of time, typically equal to one twelfth of a year, used to measure the duration of a year.
2. A period of time between the same dates in successive calendar months.
3. A period of approximately four weeks.

Origin:

From middle english month, from old english mōnath ("month"), from proto-germanic *mēnōþaz ("month"), from proto-indo-european *mēh₁nōts, *mēh₁nós ("moon, month").

Examples:

1. This year has 12 months.
2. He is paid once a month.
3. The baby is due next month.
4. The rent is due on the first of the month.
5. The month of May is known for its flowers.