The Collaborative International Dictionary of English v.0.48:

Menopause \Men"o*pause\, n. [Gr. mh`n month + ? to cause to
   cease. See Menses.] (Med.)
   The period of natural cessation of menstruation. See Change
   of life, under Change.
   [1913 Webster] Menopoma

WordNet (r) 3.0 (2006):

menopause
    n 1: the time in a woman's life in which the menstrual cycle
         ends [syn: menopause, climacteric, change of life]