• 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"

Related words...