more than

idiom

: to a great degree : very : extremely

Please call me anytime. I'm more than happy to help (out) in any way I can.

—often in a clause followed by another clause that gives more information or limits the "more than" clause in some way

I am more than happy to help you, but I'd appreciate being asked politely.

You are more than welcome to stay for dinner, but we aren't having anything special.