A small, flat, rectangular plastic case containing magnetic tape that is used for recording and playing back audio or video. noun
She found an old cassette of her favorite band from the 1980s.
The cassette player in the car was broken, so they couldn't listen to their tapes.
A container that holds photographic film, magnetic tape, or other media, designed to be inserted into a device for use. noun
The photographer loaded a new cassette of film into his camera.
The video cassette was inserted into the VCR to watch the movie.
In cycling, a set of sprockets attached to the hub of the rear wheel, used to provide different gear ratios. noun
He upgraded his bike with a new cassette for better performance on hills.
The cyclist adjusted the cassette to find the right gear for the terrain.