: 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.
Love words? Need even more definitions?Merriam-Webster unabridged