fanatic

The definition of a fanatic is a person who is overly excited and interested in something.

(noun)

An example of fanatic is someone with a room devoted to Elvis Presley in their two-bedroom house.

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See fanatic in Webster's New World College Dictionary

adjective

fanatical

Origin: < L fanaticus, of a temple, hence enthusiastic, inspired < fanum, a temple: see fane

noun

a person whose extreme zeal, piety, etc. goes beyond what is reasonable; zealot

See fanatic in American Heritage Dictionary 4

noun
A person marked or motivated by an extreme, unreasoning enthusiasm, as for a cause.
adjective
Fanatical.

Origin:

Origin: Latin fānāticus, inspired by orgiastic rites, pertaining to a temple

Origin: , from fānum, temple; see dhēs- in Indo-European roots

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