month
Americannoun
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Also called calendar month. any of the twelve parts, as January or February, into which the calendar year is divided.
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the time from any day of one calendar month to the corresponding day of the next.
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a period of four weeks or 30 days.
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Also called solar month. one-twelfth of a solar or tropical year.
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Also called lunar month. the period of a complete revolution of the moon around the earth, as the period between successive new moons synodic month, equal to 29.531 days, or the period between successive conjunctions with a star sidereal month, equal to 27.322 days, or the period between successive perigees anomalistic month, equal to 27.555 days, or the period between successive similar nodes nodical month, or draconic month, equal to 27.212 days.
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an unusually long period of time of indefinite length.
I haven't seen him for months.
idioms
noun
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one of the twelve divisions ( calendar months ) of the calendar year
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a period of time extending from one date to a corresponding date in the next calendar month
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a period of four weeks or of 30 days
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the period of time ( tropical month ) taken by the moon to return to the same longitude after one complete revolution around the earth; 27.321 58 days (approximately 27 days, 7 hours, 43 minutes, 4.5 seconds)
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the period of time ( sidereal month ) taken by the moon to make one complete revolution around the earth, measured between two successive conjunctions with a distant star; 27.321 66 days (approximately 27 days, 7 hours, 43 minutes, 11 seconds)
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Also called: lunation. the period of time ( lunar or synodic month ) taken by the moon to make one complete revolution around the earth, measured between two successive new moons; 29.530 59 days (approximately 29 days, 12 hours, 44 minutes, 3 seconds)
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informal a long unspecified period
Etymology
Origin of month
First recorded before 900; Middle English; Old English mōnath; cognate with Old High German mānōd, Old Norse mānathr. See moon
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Two months later, the costume firm filed to dismiss the suit with prejudice.
From Los Angeles Times
This traditional speech, filmed in the Lady Chapel of the medieval church in central London, follows his "good news" earlier this month about responding well to cancer treatment.
From BBC
Prime Minister Keir Starmer had called the chant "appalling", and a German music venue that was to have hosted the duo months later cancelled their show.
From Barron's
Australia this month imposed a social media ban for users under 16 for apps like Facebook, TikTok and X, opting for a different route instead of putting the responsibility on app stores for age verification.
From Barron's
In the first nine months of 2025, AI categories accounted for 37% of real GDP growth, with software and servers being major contributors.
From Barron's
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
