con·grat·u·la·tion 
(kən-grăch′ə-lāshən, -grăj′-, kəng-)
(kən-grăch′ə-lāshən, -grăj′-, kəng-)n.
1. The act of expressing joy or acknowledgment, as for the achievement or good fortune of another.
2. often congratulations An expression of such joy or acknowledgment: sent him my congratulations on winning the award.
interj. congratulations
Used to express such joy or acknowledgment: I heard you got a promotion. Congratulations!