Definition of “fanatical”

"Because he's a fanatical believer in the Overlord and if I hadn't put an end to his antics, somebody would have killed him.

Both, in their different ways, had disliked formal education, but were fanatical workers when a subject interested them.

He's a member of the Western Goals Institute, a fanatical anti-Communist organization based over in London.

I suppose the main one would be Stan Richards who plays Seth Armstrong -- he's fanatical.

It also breeds a fanatical supporter base - one growing with the Power's success.

On the other, stands al-Qaeda, a fanatical terrorist movement that would deliver the Middle East to a medieval form of Islamic rule.

Roma supporters are generally regarded as more fanatical , though there are plenty of dedicated Lazio fans as well.

Tell me, Zlotin, what does a fanatical Communist like yourself want with a hundred million dollars?

The first is almost a fanatical approach to customer satisfaction.