Answer:
A monitor is an electronic output device that is also known as a video display terminal (VDT) or a video display unit (VDU). It is used to display images, text, video, and graphics information generated by a connected computer via a computer's video card.
an instrument or device used for observing, checking, or keeping a continuous record of a process or quantity.
a television receiver used in a studio to select or verify the picture being broadcast from a particular camera.
"the playback can be displayed on an external television screen or monitor"
observe and check the progress or quality of (something) over a period of time; keep under systematic review.
"equipment was installed to monitor air quality
