To express grief or sorrow; grieve; be sorrowful; lament.To display the appearance of grief; wear the customary habiliments of sorrow.Synonyms Grieve, etc. See lament, v. i.To grieve for; lament; bewail; deplore.To convey or express grief for.Sorrowful.n. Sorrow.To have a kind of malignant glanders: said of a horse, and allusively of persons, in the phrase to mourn of the chine or mourning of the chine. Compare to mose in the chine (under mose), and see mourner.