menstruating

Verb

menstruate (third-person singular simple present menstruates, present participle menstruating, simple past and past participle menstruated)

1. (obsolete, rare, transitive) To stain with or as if with menses.
2. (intransitive) To undergo menstruation, to have a period.
   • A woman may have every quality or attribute of marriageableness who menstruates irregularly, or rarely, or even who has never menstruated at all.1884, The Medical Age, volume 2, page 358

   Synonyms:

   be on one's period, be on the rag

See all 3 meanings of menstruate