They are fanatical in their beliefs.

He hid his emotions and pretended to be enthusiastic.

The eager spectators crowded into the stadium.

A frenzied feasting tells of the beginning.

Having reached the rank of prime minister, and with the enthusiastic support of the masses, it seems he is able to wield presidential powers.

We are enthusiastic Hanshin Tigers fans.

The astronauts were greeted with cheers and applause of an enthusiastic crowd.

The astronauts were greeted by their enthusiastic cheers and applause.

My older brother is a very enthusiastic soccer fan.

Furry enthusiasts assert that popular media portrayals have told a very misleading story about their fandom.

I love cats so much. I'm a crazy cat lover.