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Synonyms

month

American  
[muhnth] / mʌnθ /

noun

  1. Also called calendar month.  any of the twelve parts, as January or February, into which the calendar year is divided.

  2. the time from any day of one calendar month to the corresponding day of the next.

  3. a period of four weeks or 30 days.

  4. Also called solar month.  one-twelfth of a solar or tropical year.

  5. 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.

  6. an unusually long period of time of indefinite length.

    I haven't seen him for months.

idioms

  1. a month of Sundays. Sunday.

month British  
/ mʌnθ /

noun

  1. one of the twelve divisions ( calendar months ) of the calendar year

  2. a period of time extending from one date to a corresponding date in the next calendar month

  3. a period of four weeks or of 30 days

  4. 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)

  5. 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)

  6. 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)

  7. informal a long unspecified period

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
month More Idioms  

    More idioms and phrases containing month

    • (for months) on end
    • by the day (month)

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.

Rents for apartments in Link Ventures’ Cambridge building are about $5,000 a month.

From The Wall Street Journal • Apr. 4, 2026

Dott costs about £35 per month and gives users two free 30 minute e-bike rides per day in cities including Bath, Bristol and Glasgow.

From BBC • Apr. 3, 2026

Despite its rocky jobs report for the month of February, the Bureau of Labor Statistics came out Friday with better-than-expected employment projections for March: 178,000 new positions added—almost triple the amount non-government economists had anticipated.

From Slate • Apr. 3, 2026

“TYG is a fund for a specific moment and a specific investor,” wrote Michael A. Gayed, author of the Lead-Lag Report Substack, in a report last month.

From Barron's • Apr. 3, 2026

“Happy birthday, Lexie. I know it’s not for another month, but Maverick couldn’t wait, and I know how much you’ve been wanting a dog.”

From "Red Flags and Butterflies" by Sheryl Azzam

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.