#1 congratulate v. [compliment] say something to someone that expresses praise; "He complimented her on her last physics paper". wn
#2 congratulate v. [felicitate] express congratulations. wn
#3 congratulate v. [pride, plume] be proud of; "He prides himself on making it into law school". wn
#4 congratulate v. [preen] pride or congratulate (oneself) for an achievement. wn
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