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Singular
ethics

Plural
none

Singular
ethic

Plural
ethics

(countable & uncountable)

  1. (philosophy); (uncountable) The study of what is good and what is bad, or what should be good and bad. Ethics often is about making rules for how to act, and saying why certain things are bad.
    She is studying ethics at the university.
    "Do no harm" is the basis of medical ethics.
  2. The plural form of ethic; more than one (kind of) ethic.

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