n. The act of lamenting or expressing grief; lamentation; sorrow.n. The outward tokens or signs of sorrow for the dead, such as the draping of buildings in giving expression to public sorrow, the wearing of garments of a particular color, the use of black-bordered handkerchiefs, black-edged writing-paper and visiting-cards, etc.Having to do with mourning for the dead; of such kind as is used in mourning for the dead: as, a mourning garment; a mourning hat-band.n. See mourn.