fan1
  
  n.
   - an apparatus with rotating blades that creates a current of air for cooling or ventilation.
- a hand-held device, typically folding and shaped like a segment of a circle when spread out, that is waved so as to cool the user.
- a fan-shaped alluvial or talus deposit at the foot of a slope.
v.
 (fans, fanning, fanned)
   - cool by waving something to create a current of air. ▸drive away with a waving movement. ▸Baseball  & Ice Hockey  swing unsuccessfully at the ball or puck. ▸Baseball  strike out (a batter). 
- (of an air current) increase the strength of (a fire). ▸make (a belief or emotion) stronger. 
- 
(fan out)
 spread out over a wide area.
Derivative
  
  Etymology
  OE fann (as a noun denoting a device for winnowing grain), fannian (v.), from L. vannus ‘winnowing fan’.
 
  
    
fan2
  
  n.
 a person who has a strong interest in or admiration for a particular activity, performer, etc.
Derivative
  
  Etymology
  C19 (orig. US): abbrev. of fanatic.