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congratulation [kənˌgrætʃəˈleɪʃən]

1 congratulation noun
  • a message telling someone that you are happy because of his or her success or good luck : words that congratulate someone
  • —used to tell someone that you are happy because of his or her success or good luck —often + on
  • the act of telling someone that you are happy because of his or her success or good luck : the act of congratulating someone