From Longman Dictionary of Contemporary Englishcongratulationscongratulationsa) 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. → congratulation
Examples from the Corpus
congratulations• Congratulations on passing your driving test.• Congratulations on your new job, Jenny.• Congratulations! Is it a girl or boy?• Sidney sent his congratulations.• Donna was swamped with congratulations from friends and fellow reporters when she won the prize. 