lament /ləˈmɛnt/noun 2verb 2forms 5 noun2 •An expression of grief, suffering, sadness or regret. •A song expressing grief. verb2 •To express grief; to weep or wail; to mourn.Ye shall weep and lament, but the world shall rejoice. — 1611 •To express great sorrow or regret over; to bewail.One laugh'd at follies, one lamented crimes. — 1693 formslamented · lamenting · lamenteth · laments · lamentest