Model based definition

Okay, kiddo! So, you know how when you want to build something or make a toy, you usually draw it first on paper, like a blueprint? That way you can see all the parts and how they fit together before you actually start making it.

Well, model based definition is kind of like that, but for making things on a computer instead of with toys. It's a way to use a 3D model of something (like a car or a building) to show exactly how it should look, how it should be made, and how all the parts fit together.

So instead of just looking at a 2D drawing or a list of measurements, people can see a full 3D model that shows them everything they need to know about how to make something. This can help make sure that all the parts fit together correctly and that everything works the way it's supposed to.

And the cool thing is, because you're using a digital model, you can also use it to do simulations and tests to make sure everything works before you actually make the thing in real life. So it saves time and money, and makes sure that everything is done right the first time!