Freebase(0.00 / 0 votes)Rate this definition: Portable Network Graphics. Portable Network Graphics is a raster graphics file format that supports lossless data compression. PNG was created as an improved, non-patented replacement for Graphics Interchange Format, and is the most used lossless image compression format on the World Wide Web.
Definition of menopause. 1 : the natural cessation of menstruation that usually occurs between the ages of 45 and 55; also : the period during which such cessation occurs âcalled also climacteric â compare perimenopause. 2 : cessation of menstruation from other than natural causes.
Menopause Menopause is the time when your menstrual periods stop permanently and you can no longer get pregnant. Some people call the time leading up to a womanâs last period menopause. This time actually is the transition to menopause, or perimenopause. After menopause, your body makes much less of the hormones estrogen and progesterone. Very low estrogen levels after menopause can affect your health and cause symptoms such as hot flashes.