American English

Definition of unconscionable adjective from the Oxford Advanced American Dictionary



    [usually before noun] (formal)
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  1. 1(of an action, etc.) so bad, immoral, etc. that it should make you feel ashamed It would be unconscionable for her to keep the money.
  2. 2(often humorous) too great, large, long, etc. synonym excessive You take an unconscionable amount of time getting dressed!
See the Oxford Advanced Learner's Dictionary entry: unconscionable