Available Definitions:
1) n. - The act of sorrowing or expressing grief; lamentation; sorrow.
2) n. - Garb, drapery, or emblems indicative of grief, esp. clothing or a badge of somber black.
3) a. - Grieving; sorrowing; lamenting.
4) a. - Employed to express sorrow or grief; worn or used as appropriate to the condition of one bereaved or sorrowing; as, mourning garments; a mourning ring; a mourning pin, and the like.