lamentation /ˌlæm.ənˈteɪ.ʃən/ noun5 •The act of lamenting. •A sorrowful cry; a lament. •Specifically, mourning. •lamentatio, (part of) a liturgical Bible text (from the book of Job) and its musical settings, usually in the plural; hence, any dirge •A group of swans. formslamentations