moral high ground

• (US) IPA^(key): /ˌmɔɹəl ˈhaɪ ɡɹaʊnd/

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moral high ground (plural moral high grounds)

1. (idiomatic) A position or point of view which is ethically superior or more reputable, in comparison to others which are under consideration.
   • 2002 May 6, Robert Horn, “The Next Face-Off”, in Time‎:

     Her legitimacy (as the leader of the party that won the 1990 general election), integrity and stoic acceptance of house arrest enable her to occupy the moral high ground.

• moral low ground

• high ground