Refers to an original model, early sample, or test version of a product, system, or concept. Used in technology, design, and general contexts.
このプロトタイプはまだ改良の余地がある。
This prototype still has room for improvement.
We are developing a prototype for the new app.
We built a prototype of the new robot.
The team developed a prototype in half a year.
They are testing the prototype at the factory.