General Definition: 1. Of any two things, to rotate simultaneously, such as the two reels of an old-fashioned audio tape recorder, or any thing or any action that can be associated with this in context. As a Noun: 1. A machine that records and plays sounds on tape. English = tape recorder. 2. Plastic tape made in long strips and covered with a magnetic substance. It is used to record sounds, pictures, and computer information. English = magnetic tape (particularly computers); audio tape (sound only); video tape (pictures and sound). As a Verb or Adjective: 1. To use a tape recorder to record sounds on tape. English = tape, tape record.