American English

Definition of enthusiast noun from the Oxford Advanced American Dictionary



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  1. 1enthusiast (for/of something) a person who is very interested in something and spends a lot of time doing, watching, etc. it a soccer enthusiast an enthusiast of jazz
  2. 2enthusiast (for/of something) a person who approves of something and shows enthusiasm for it enthusiasts for national health insurance
See the Oxford Advanced Learner's Dictionary entry: enthusiast