menstruation
noun
men·stru·a·tion
ˌmen(t)-strü-ˈwā-shən 
men-ˈstrā-
: a cyclical discharging of blood, secretions, and tissue debris from the uterus that recurs in nonpregnant breeding-age primate females at approximately monthly intervals and that is considered to represent a readjustment of the uterus to the nonpregnant state following proliferative changes accompanying the preceding ovulation
also
: period sense 6c
Examples of menstruation in a Sentence
a first menstruation can be somewhat scary for girls who are unprepared
Recent Examples on the Web
To discuss anything related to the pelvic region, especially menstruation, went against all norms.
—
Nami Mun, The Atlantic, 16 May 2026
From menstruation to menopause, too much has been left unaddressed for too long.
—Geri Stengel, Forbes.com, 15 May 2026
Six years later, the go-getter is still addressing the community’s needs and is helping to reshape societal perceptions of menstruation.
—Bridgette Bartlett Royall, Essence, 14 May 2026
The most common side effects of TEPEZZA include muscle cramps or spasms, nausea, hair loss, diarrhea, feeling tired, high blood sugar, hearing problems, taste changes, headache, dry skin, ear discomfort, weight loss, nail problems, and changes in menstruation.
—Emily Cegielski, Flow Space, 6 May 2026
See All Example Sentences for menstruation
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Nami Mun, The Atlantic, 16 May 2026
From menstruation to menopause, too much has been left unaddressed for too long.
—Geri Stengel, Forbes.com, 15 May 2026
Six years later, the go-getter is still addressing the community’s needs and is helping to reshape societal perceptions of menstruation.
—Bridgette Bartlett Royall, Essence, 14 May 2026
The most common side effects of TEPEZZA include muscle cramps or spasms, nausea, hair loss, diarrhea, feeling tired, high blood sugar, hearing problems, taste changes, headache, dry skin, ear discomfort, weight loss, nail problems, and changes in menstruation.
—Emily Cegielski, Flow Space, 6 May 2026
See All Example Sentences for menstruation
Cite this Entry
“Menstruation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/menstruation. Accessed 20 May. 2026.
Copy CitationKids Definition
menstruation
noun
men·stru·a·tion
ˌmen(t)-strə-ˈwā-shən
men-ˈstrā-shən
: a discharging of blood, secretions, and tissue debris from the uterus at periods of approximately one month in female primates of breeding age that are not pregnant
also
: period sense 3c
Medical Definition
menstruation
noun
men·stru·a·tion
ˌmen(t)-strə-ˈwā-shən, men-ˈstrā-
: a discharging of blood, secretions, and tissue debris from the uterus that recurs in nonpregnant human and other primate females of breeding age at approximately monthly intervals and that is considered to represent a readjustment of the uterus to the nonpregnant state following proliferative changes accompanying the preceding ovulation
also
: period sense 1b
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