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month

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The definition of a month is any of the twelve parts of the calendar year.

(noun)

An example of a month is January.

See month in Webster's New World College Dictionary

noun

any of the main parts (usually twelve) into which the calendar year is divided
also calendar month
1. the time from any date of one month to the corresponding date of the next
2. a period of four weeks or 30 days
the period of a complete revolution of the moon around the earth with respect to some object; esp.,
1. the period () marked by two successive lunar conjunctions with the sun, equal on the average to 29.53 days: also called lunar month
2. the sidereal month
one twelfth of the solar year
in full solar month

Origin: ME < OE monath, akin to Ger monat, ON manuthr < Gmc *menōth- < IE *mēnōt, month, moon, var. of mēn: see moon

See month in American Heritage Dictionary 4

noun

A unit of time corresponding approximately to one cycle of the moon's phases, or about 30 days or 4 weeks.
Abbr. mo. One of the 12 divisions of a year as determined by a calendar, especially the Gregorian calendar. Also called calendar month.
A period extending from a date in one calendar month to the corresponding date in the following month.
A sidereal month.
A lunar month.
A solar month.

Origin:

Origin: Middle English moneth

Origin: , from Old English mōnath; see mē-² in Indo-European roots

Usage Note: The singular month, preceded by a number and a hyphen, is used as a compound attributive: a three-month vacation. The plural possessive form without a hyphen is also possible: a three months' vacation.

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