in a way that is certain or that shows that you are certain
قطعاً, بیشک, مسلماً, حتماً, بیتردید, بهطور قطع, بدون شک, یقیناً, بهطور حتم, بیگمان
The date of the move has not been definitely decided yet .
Please say definitely whether you will be coming or not.