How to use "definitely" in a sentence

It can be helped by national planning for and supervision of all forms of transportation and of communications and other utilities that have a definitely public character

If some stranger wanted her to feel more pain over the loss of her child, however, that was definitely unsettling

This is definitely the right place."

One thing for sure, he's definitely not on our side

"Which definitely isn't the case," Tina said.

"Then it's definitely a malignant tumor?"