noun Date: 1570 a person filled with enthusiasm: as, one who is ardently attached to a cause, object, or pursuit , one who tends to become ardently absorbed in an interest
ENTHUSIAST
Meaning of ENTHUSIAST in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012