(trade mark) a plastic film that can polarize a beam of light; often used in sunglasses to eliminate glare
"After putting on my new Polaroid sunglasses, the blinding reflection off the wet highway vanished instantly."
Alternative letter-case form of polaroid
"The photographer adjusted the angle of the Polaroid to ensure the glare from the lake's surface was completely eliminated before snapping the shot."
A sheet of plastic embedded with microscopic crystals of herapathite or similarly acting material, so that light passing through it is polarised.
To photograph with a polaroid camera.
"She quickly snapped a photo of our group and handed us the instant picture from her Polaroid."