A prototype is an early, working version of something built to test whether an idea actually works. When engineers design a new robot, they don't immediately manufacture thousands of them. Instead, they build a prototype: a single model they can experiment with, improve, and learn from.

Prototypes are rough around the edges. They might use duct tape, cardboard, or borrowed parts. A prototype bicycle might have a frame welded together in a garage workshop, testing a new gear system before anyone worries about paint colors or fancy details. The point isn't to make something perfect or beautiful. The point is to discover what works and what doesn't.

Scientists, inventors, and designers all rely on prototypes. Before the Wright brothers flew at Kitty Hawk, they built and tested numerous prototype gliders. Video game developers create prototype levels to see if their game mechanics are actually fun. An architect might build a small prototype model of a building design to test how light moves through the windows.

A prototype is the first real attempt to bring an idea from imagination into physical reality, where you can touch it, test it, and learn from it.