What is the meaning of veil?

noun

• A garment that covers the head and face.
  • synonyms: head covering
• A membranous covering attached to the immature fruiting body of certain mushrooms.
  • synonyms: velum
• The inner membrane of embryos in higher vertebrates (especially when covering the head at birth.
  • synonyms: caul, embryonic membrane
• A vestment worn by a priest at High Mass in the Roman Catholic Church; a silk shawl.
  • synonyms: humeral veil

verb

• To obscure, or conceal with or as if with a veil.
  • usage: "women in Afghanistan veil their faces"
• Make undecipherable or imperceptible by obscuring or concealing.
  • usage: "a hidden message"; "a veiled threat"
  • synonyms: obscure, blot out, obliterate, hide