American English

Definition of erratic adjective from the Oxford Advanced American Dictionary



    (often disapproving)
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  1. not happening at regular times; not following any plan or regular pattern; that you cannot rely on synonym unpredictable The electricity supply here is quite erratic. She had learned to live with his sudden changes of mood and erratic behavior. Mary is a gifted but erratic player (= she does not always play well). Irrigation measures will be necessary in areas of erratic rainfall.
  2. erratically
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  3. NAmE//ɪˈræt̮ɪkli//
    adverb He was obviously upset and was driving erratically. His heart beat erratically.
See the Oxford Advanced Learner's Dictionary entry: erratic

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