1. to feel or express sorrow or regret for: to lament his absence.
2. to mourn for or over.
3. to feel, show, or express grief, sorrow, or regret.
4. to mourn deeply.
5. an expression of grief or sorrow; a passionate expression of grief, often in music, poetry, or song form.
6. a formal expression of sorrow or mourning, especially in verse or song; an elegy or dirge.
Synonyms: bewail, bemoan, deplore, grieve, weep, lamentation, moan. monody, threnody.
Etymology: Latin lāmentum plaint; verb < Latin lāmentārī, derivative of lāmentum.
[Herbert James Draper - Lament]