American English

Definition of impeccable adjective from the Oxford Advanced American Dictionary

     

    impeccable

     adjective
    adjective
    NAmE//ɪmˈpɛkəbl//
     
     
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  1. 1without mistakes or faults synonym perfect
  2. 2 impeccable manners/taste Her written English is impeccable. He was dressed in a suit and an impeccable white shirt.
NAmE//ɪmˈpɛkəbli//
 
adverb to behave impeccably impeccably dressed
See the Oxford Advanced Learner's Dictionary entry: impeccable