/kən,grætʃʊ'leɪʃn; kən,ˇrætʃə`leʃən/
n
1 [U] congratulating or being congratulated 祝贺或受到祝贺
*a speech of congratulation for the winner 对获胜者的贺词.
2 congratulations [pl]
(a) words ofcongratulation 贺词
*offer sb one's congratulations on his success 祝贺某人成功.
(b) (used as an interj 用作叹词)
*You've passed your driving test? Congratulations! 你驾驶测验合格了? 向你道喜!
* Congratulations on winning the prize! 祝贺你获奖!

n[U]
congratulations
a) used when you want to congratulate someone
　'I've just passed my driving test!' 'Congratulations!'
congratulations on
　Congratulations on a superb performance!
b) words saying you are happy that someone has achieved something
　Give Oscar my congratulations.
when you tell someone that you are happy because they have achieved something or because something nice has happened to them
　letters of congratulation