American English

Definition of benign adjective from the Oxford Advanced American Dictionary



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  1. 1(formal) (of people) kind and gentle; not hurting anyone You would never have guessed his intentions from the benign expression on his face.
  2. 2(medical) (of tumors growing in the body) not dangerous or likely to cause death opposite malignant
adverb He smiled benignly.
See the Oxford Advanced Learner's Dictionary entry: benign