1. a small plastic case containing magnetic tape for recording or playing back sound or video
2. a sealed container holding a substance that can be inserted into a machine

Examples

• She found an old cassette of her favorite band in the attic.
• The walkman played cassettes through small headphones.
• He recorded the lecture on a blank cassette tape.
• The video cassette got stuck in the VCR.
• Insert the ink cassette into the printer carefully.
• The film cassette must be loaded in complete darkness.
• My grandmother still has boxes of music cassettes from the 1980s.