Sentence examples similar to it is certainly definite from inspiring English sources

It is certainly big.

It is certainly daring.

It is certainly unprecedented.

It is certainly possible.

And it's certainly encouraging to see Apple being definite about its stance in the App Store rules.

"I don't know anything definite, but it's certainly on my mind to do that".

It's certainly a promising start, and the Hollywood hunk has definite talent.

It's certainly a long way from the scraps he used to get into in the 70s, but there's a definite charge in the air.

It was certainly groundbreaking.

It's certainly averaging.

It's certainly convenient.