2D animation includes drawn animation, cartoon animation, anime, and cutout animation. It can be made either by hand, using digital tools or a combination of the two. For example drawn on paper or drawn on a graphics tablet, made with software that will allow for digital ‘tweening’, using cutouts in a stop motion method or with software to move each moving part.
I have differentiated it from Motion Graphics where the objects will move but not transform to the degree of 2D animation. However the two are often used together, which can make it hard for the average viewer to tell them apart. The two terms are often confused by clients, hence there is plenty of confusion on the internet about what these two things actually are.
Masters of 2D Hand Drawn Animation
Making drawn animation on paper