/ ˌpiː em ˈesː; NAmE / ( BrE ) (also PMT / ˌpiː em ˈtiː; NAmE /, NAmE , BrE ) noun
[ U ] physical and emotional problems such as pain and feeling depressed that many women experience before their period (= flow of blood) each month. PMS/PMT are abbreviations for 'premenstrual syndrome / tension'.