unique or novel device, method, composition or process / From Wikipedia, the free encyclopedia
An invention is a new thing that someone has made. The computer was an invention when it was first made. We say when it was "invented". New things that are made or created are called inventions. Cars and plastics are inventions that everyone knows. Inventions are made by inventors. Many inventions are patented.
Ideas are also called inventions. Writers can invent characters, and then invent a story about them.