Avisor can be

• The bill of abaseball cap or similar hat.

• A ball cap without the crown.

• An opaque panel mounted over thewindshield of anautomobile or othervehicle that thedriver or front seatpassenger can adjust to block direct sunlight.

• Green eyeshade - a green tinted visor commonly associated with old fashionedaccountants,telegraphers andcopyeditors formerly to lessen eye strain.

• Hats