taboo - definition and synonyms

noun 

Your browser doesn’t support HTML5 audio

/təˈbuː/
singulartaboo
pluraltaboos
  1. 1
    [countable] something that people do not do or talk about because it is very offensive or shocking
  2. 2
    [countable] something that is not allowed by a particular religion
    1. a.
      [uncountable] the system in some religions in which certain actions must not be done and certain objects must not be touched because they have great spiritual importance