What is the meaning of mourning?

noun

• State of sorrow over the death or departure of a loved one.
  • synonyms: bereavement
• The passionate and demonstrative activity of expressing grief.
  • synonyms: lamentation

verb

• Feel sadness.
  • usage: "She is mourning her dead child"
  • synonyms: mourn
• Observe the customs of mourning after the death of a loved one.
  • synonyms: mourn

adjective

• Sorrowful through loss or deprivation.
  • usage: "bereft of hope"
  • synonyms: bereaved, bereft, grief-stricken, grieving, sorrowing