Simple English definitions for legal terms
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A device is something that someone has made that does something. It can be a machine or something that you can hold in your hand. It's different from a chemical discovery because it's something that has been physically created.
Definition: A device is a mechanical invention that is different from a chemical discovery. It can be an apparatus or an article of manufacture. It is also known as a machine.
These examples illustrate the definition of a device because they are all mechanical inventions that perform specific functions. They are not chemical discoveries, but rather physical objects that are designed to make our lives easier.