a small case to hold a removable part of some mechanism, designed for convenience in inserting and removing the working part. Most commonly referring to a tape cassette, made mostly of plastic, which holds a reel of magnetic tape for tape players or tape recorders or video cassette recorders. The term may refer, as for tape cassettes, to the integrated case plus tape, or sometimes only to the case itself separate from the contents.
A sound recording medium which employs a magnet tape, onto which analogue signals are recorded. Cassette decks have no been phased out in preference to DAT, CD and MD.