regret - definition and synonyms

 
noun [countable/uncountable] 

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/rɪˈɡret/
singularregret
pluralregrets
  1. a feeling of sadness about something that has happened
    with great/deep regret:

    It is with deep regret that we have to report the deaths of five soldiers.

    express regret:

    The doctor expressed regret over his inability to do more for my father.

    1. a.
      a feeling of sadness about something that you wish you had not said or done

      His face showed no sign of regret for what he had done.

      have no regrets:

      I have no regrets about leaving the army.

      only/biggest regret:

      Tom’s biggest regret was not being there when his mother died.