noun.
The permanent cessation of menstruation, usually occurring between the ages of 45 and 55.
noun.
The period during which such cessation occurs.
The Century Dictionary and Cyclopedia
noun.
The final cessation of the menses or monthly courses of women, which occurs normally between the ages of forty-five and fifty; the end of menstruation.
the GNU version of the Collaborative International Dictionary of English
noun.
The period of natural cessation of menstruation. See Change of life, under change.