fan1 S2 W2 [countable]
someone who likes a particular sport or performing art very much, or who admires a famous person:
Football fans began rioting in the streets.
fan mail/letters (=letters sent to famous people by their fans)
a machine with turning blades that is used to cool the air in a room by moving it around:
a ceiling fan
a flat object that you wave with your hand which makes the air cooler