also two dimensional
1.
A ~ object or figure is flat rather than solid so that only its length and width can be measured.
...new software, which generates both ~ drawings and three-dimensional images.
ADJ: usu ADJ n
2.
If you describe fictional characters as ~, you are critical of them because they are very simple and not realistic enough to be taken seriously.
I found the characters very ~, not to say dull.
ADJ disapproval