/ ɪnˈθjuːziæzəm; NAmE -ˈθuː-/ noun
1.
[ U ] enthusiasm (for sth / for doing sth) a strong feeling of excitement and interest in sth and a desire to become involved in it :
I can't say I share your enthusiasm for the idea.
She never lost her enthusiasm for teaching.
He had a real enthusiasm for the work.
The news was greeted with a lack of enthusiasm by those at the meeting.
'I don't mind,' she said, without much enthusiasm.
full of enthusiasm
2.
[ C ] ( formal ) something that you are very interested in and spend a lot of time doing
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WORD ORIGIN
early 17th cent. (originally referring to religious fervour): from French enthousiasme , or via late Latin from Greek enthousiasmos , from enthous possessed by a god, inspired (based on theos god).