Greetings,
A 3D Printer is a machine which works on the principle of additive manufacturing. By definition, 3D printing is a manufacturing process of converting a 3D CAD
file into a tangible solid three-dimensional object by successively laying down thin layers of material.
In simplistic form, you can consider that you draw any sketch on a piece of A4 paper.
A paper is considered to have only two dimensions (length and width). Now replicate that same sketch on 100 A4 papers and stack them one over the other.
Now you can measure the height of the stack as well. This becomes the third dimension of the sketch, or you can call it as a three-dimensional drawing.
So, in short, a single paper can be considered as a single layer. And a 3D printer lays down multiple such layers one above the other and forms a solid three-dimensional object.
This explanation was in lay man's terms. So, I would suggest you read the below-shared articles for understanding the exact working of a 3D printer.
You will also understand the proper terminology for the technology.
How FDM/FFF 3D Printing Technology Works? - MANUFACTUR3D
The 3D Printing Process: How does it Work? - MANUFACTUR3D
For more queries, you can browse all the articles published on the site shared above. You will learn everything about technology.
You need of any our Technical Support agent. Please call Technical Support team at +1 888 597 3962 our experts are available 24/7 by phone. 
More Info Visit Site - https://printercontactsupport.com/