Definitions of taboo:

  • noun:   an inhibition or ban resulting from social custom or emotional aversion
  • noun:   a prejudice (especially in Polynesia and other South Pacific islands) that prohibits the use or mention of something because of its sacred nature
  • verb:   declare as sacred and forbidden
  • adjective:   forbidden to profane use especially in South Pacific islands
  • adjective:   excluded from use or mention
    Example: "A taboo subject"