Interesting, either you didn't read the entire definition, or are deliberately trying to sidetrack true Faith applied.
Here is the completed definition word for word.
"Pisteuo is a personal surrender to Him and a life inspired by such surrender. Producing a full acknowledgement of Gods revelation of truth."
"this all stands in contrast to belief in it's purely natural exercise, which consists of an opinion held in good faith without necessary reference to it's proof. The object of Abrams Faith was not God's promise (that was the occasion of it's exercise) his Faith rested on God Himself."
This proves everything that I've been trying to show you !