'Deflector' definitions:

Definition of 'deflector'

(from WordNet)
noun
A device intended to turn aside the flow of something (water or air or smoke etc)

Definition of 'Deflector'

From: GCIDE
  • Deflector \De*flect"or\, n. (Mech.) That which deflects, as a diaphragm in a furnace, or a cone in a lamp (to deflect and mingle air and gases and help combustion). [1913 Webster]