n. The act of bewailing; expression of sorrow; a mournful outcry.n. plural The shorter title of the Lamentations of Jeremiah, one of the poetical books of the Old Testament.n. plural The music to which the first three lessons, taken from the Lamentations of Jeremiah, are sung in the Roman Catholic Church, in the office called Tenebræ, on Thursday, Friday, and Saturday of Holy Week.