The correct spelling is definitely. ' The website includes a Frequently Asked Questions page which is similarly to the point. There is just one question: 'Are you sure? ', which receives the predictable response: 'Definitely'.

What is the #1 misspelled word?

“Quarantine” was the most widely misspelled word, most searched in 12 states, the data revealed. Many people even thought it was spelled “corn teen.”

Is it definitely or defiantly?

You use definitely when you want to describe something clearly, unequivocally, or without a doubt. You use defiantly to describe something or someone that's challenging or brazenly resistant to something. Most mistakes with these two words arise when writers mean to say definitely but accidentally say defiantly.