1. （卡式或磁带）录音机;录像机
    You can refer to a cassette recorder, a tape recorder, or a video recorder as a recorder.

    e.g. Rodney put the recorder on the desk top and pushed the play button.
           罗德尼把录音机放在桌面上，按下了播放键。

2. 直笛；竖笛
    A recorder is a wooden or plastic musical instrument in the shape of a pipe. You play the recorder by blowing into the top of it and covering and uncovering the holes with your fingers.

3. 刑事法院兼职法官（英格兰和威尔士的法律体制下被任命在刑事法庭兼任法官的律师）
    In the legal system of England and Wales, a recorder is a lawyer who is appointed as a part-time judge in the Crown Court.

4. 记录装置;记录器
    A recorder is a machine or instrument that keeps a record of something, for example in an experiment or on a vehicle.

    e.g. Data recorders also pinpoint mechanical faults rapidly, reducing repair times.
           数据记录仪还能迅速查明机械故障，减少维修次数。