Clarifying terminology: menopause, menopausal transition, perimenopause, postmenopause

Have you ever, like me, felt unclear about what exactly the terms menopause, menopausal transition, perimenopause, and postmenopause mean? What EXACTLY is “menopause”? Please note that: – When I use the term “menopause” here, I am talking about natural menopause and not surgical menopause that is induced by the removal of both ovaries. – Similarly,…