mourning

from The American Heritage® Dictionary of the English Language, 5th Edition.

• noun The actions or expressions of one who has suffered a bereavement.
• noun Conventional outward signs of grief for the dead, such as a black armband or black clothes.
• noun The period during which a death is mourned.

from The Century Dictionary.

• noun See mourn.
• noun The act of lamenting or expressing grief; lamentation; sorrow.
• noun 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.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Grieving; sorrowing; lamenting.
• adjective Employed to express sorrow or grief; worn or used as appropriate to the condition of one bereaved or sorrowing
• adjective (Bot.) a garden flower (Scabiosa atropurpurea) with dark purple or crimson flowers in flattened heads.
• adjective (Zoöl.) a wild dove (Zenaidura macroura) found throughout the United States; -- so named from its plaintive note. Called also Carolina dove. See Illust. under Dove.
• adjective (Zoöl.) an American ground warbler (Geothlypis Philadelphia). The male has the head, neck, and chest, deep ash-gray, mixed with black on the throat and chest; other lower parts are pure yellow.
• noun The act of sorrowing or expressing grief; lamentation; sorrow.
• noun Garb, drapery, or emblems indicative of grief, esp. clothing or a badge of somber black.
• noun See under Deep.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb Present participle of mourn.
• noun The act of expressing or feeling sorrow or regret; lamentation.
• noun Feeling or expressing sorrow over someone's death.
• noun The traditional clothes worn by those who mourn (in Western societies, typically coloured black).

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun the passionate and demonstrative activity of expressing grief
• adjective sorrowful through loss or deprivation
• noun state of sorrow over the death or departure of a loved one