To express joy or acknowledgment, as for the achievement or good fortune of (another).(verb-transitive)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "congratulate" in a sentence
"We once again congratulate all of the candidates for their leadership and dedication to providing this country with a New Direction."
"I think at least this panel should acknowledge that you heard the word congratulate about two minutes after somebody on this panel said she didn't use the word congratulate."
"Sadat and I have been awarded the Nobel Peace Prize, let me from this rostrum again congratulate him - as I did in a direct conversation between Jerusalem and Cairo a few weeks ago on the morrow of the announcement."