In plain words
Output is what comes back from the machine after it processes something.
Why learners confuse it
People sometimes say the computer is dead when the real problem is only one output path such as the monitor or speakers.
Output is information that comes out from the computer.
If you cannot tell output problems from wider system problems, you may think the whole computer is broken when only the display or sound path failed.
Output is what the system sends back to a person, device, or another system after doing work.
Output is what the computer shows, says, prints, or sends back after it works.
Output is what comes back from the machine after it processes something.
People sometimes say the computer is dead when the real problem is only one output path such as the monitor or speakers.
Study the larger concept after the word itself becomes clear.