= fanatic, adj. 2.

Resembling a zealot; characterized by (excessive) zeal; typical or characteristic of a zealot or zealots. Cf. zealotic, adj. 1.

That is a zealot; characteristic of a zealot or zealots.

Typical or characteristic of a zealot or zealots; characterized by (excessive) zeal.

Of persons, their actions, attributes, etc.: Characterized, influenced, or prompted by excessive and mistaken enthusiasm, esp. in religious matters.

showing excessive zeal for the synagogue, fanatical.

(un-, prefix1 affix 4.)

Of a person: (originally) having eyes pointing in different directions; having eyes which are rotating wildly. Hence: having a crazed or…

belonging or devoted to a ‘hobby-horse’ or hobby, crotchety, whimsical.