| Noun | 1. | Polaroid - (trade mark) a plastic film that can polarize a beam of light; often used in sunglasses to eliminate glareplastic film, film - a thin sheet of (usually plastic and usually transparent) material used to wrap or cover things dark glasses, shades, sunglasses - spectacles that are darkened or polarized to protect the eyes from the glare of the sun; "he was wearing a pair of mirrored shades" |