menses

noun

men·​ses ˈmen-(ˌ)sēz How to pronounce menses (audio)
plural in form but singular or plural in construction
: the menstrual flow

Word History

Etymology

Latin, literally, months, plural of mensis month — more at moon

First Known Use

1597, in the meaning defined above

Time Traveler
The first known use of menses was in 1597

Browse Nearby Words

Cite this Entry

“Menses.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/menses. Accessed 11 Sep. 2025.

Kids Definition

menses

singular or plural noun
men·​ses ˈmen-ˌsēz How to pronounce menses (audio)
: the menstrual flow

Medical Definition

menses

noun, plural in form but singular or plural in construction
men·​ses ˈmen-ˌsēz How to pronounce menses (audio)
: the menstrual flow

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