Two-dimensional (adjective)

1. Having or representing only two dimensions; lacking the third dimension of depth.
2. Flat and lacking in complexity or depth.

Origin:

Early 20th century: from two + dimensional.

Examples:

1. A two-dimensional drawing.
2. A two-dimensional character.
3. The painting is two-dimensional.
4. The map is two-dimensional.
5. The game's graphics are two-dimensional.