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congratulation

[kuh n-grach-uh-ley-shuh n or, often, -graj-, kuh ng-]
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noun
  1. the act of congratulating.
  2. congratulations, an expression of joy in the success or good fortune of another.
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interjection
  1. congratulations, (used to express joy in the success or good fortune of another): Congratulations! You have just won the lottery!
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Origin of congratulation

1400–50; late Middle English < Late Latin congrātulātiōn- (stem of congrātulātiō), equivalent to congrātulāt(us) (see congratulate) + -iōn- -ion
Related formscon·grat·u·la·tion·al, adjectivepre·con·grat·u·la·tion, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Word Origin and History for congratulation

n.

mid-15c., from Latin congratulationem (nominative congratulatio), noun of action from past participle stem of congratulari "wish joy," from com- "together, with" (see com-) + gratulari "give thanks, show joy," from gratus "agreeable" (see grace (n.)).

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Online Etymology Dictionary, © 2010 Douglas Harper