It can be difficult to completely define a robot because there are so many different types.
Perhaps one description is a mechanical device that has a number of input and output devices with a control system allowing intelligent decisions to be made depending on the feedback received.
For example a 'Robot Arm' is a mechanical arm mounted on a moving platform. The arm picks up and places objects under the commands of a computer. Robot arms are widely used in industry as 'pick and place' machines for assembling products such as circuit boards.
Welding Robots work as a group to assemble a car. They exchange information as the car is built, so one robot can affect the behaviour of another.
There are more complex robots designed purely for fun - for example in the television program "Robot Wars". These are not really robots because a person is always controlling it by radio. But they do move about, swivel and turn and crash into each other.
Probably the 'perfect' robot would be one that looks like a person, has the intelligence and common sense of a person and can make decisions based on knowing the difference between right and wrong. Unfortunately, no such robot exists except in hollywood films.
Challenge see if you can find out one extra fact on this topic that we haven't already told you
Click on this link: Robot