[men-stroo-ey-shuh n, -strey-]


the periodic discharge of blood and mucosal tissue from the uterus, occurring approximately monthly from puberty to menopause in nonpregnant women and females of other primate species.
the period of menstruating.

Origin of menstruation

First recorded in 1770–80; menstruate + -ion Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Related Words for menstruation

discharge, bleeding, menses, monthlies, catamenia, menorrhea

Examples from the Web for menstruation

Contemporary Examples of menstruation

Historical Examples of menstruation

British Dictionary definitions for menstruation



the approximately monthly discharge of blood and cellular debris from the uterus by nonpregnant women from puberty to the menopauseAlso called: menses Nontechnical name: period
Derived Formsmenstruous (ˈmɛnstrʊəs), adjective
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

Word Origin and History for menstruation

1680s, from Late Latin menstruare, from menstruus "monthly" (see menstrual) + -ation. Old English equivalent was monaðblot "month-blood." Middle English had menstrue (n.), late 14c., from Old French menstrue, from Latin menstruum.

Online Etymology Dictionary, © 2010 Douglas Harper

menstruation in Medicine




The process or an instance of discharging the menses.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

menstruation in Science



The monthly flow of blood from the uterus beginning at puberty in girls and other female primates. Also called menses See also menstrual cycle.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

menstruation in Culture



The periodic discharge of the blood-enriched lining of the uterus through the vagina. Menstruation marks the end of one menstrual cycle and the beginning of another.

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.