0 flat, having width and length but not depth --
1 A person or story that is two-dimensional is too simple, showing little deep, serious thought, or understanding: --
I didn't believe in any of the characters in the book - they were somehow two-dimensional.
2 flat, having width and length but not depth: --
Painting is a two-dimensional art that tries to give the illusion of three dimensions.
3 → 2-D --
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
We kunnen het stap voor stap voltooien, hoe lang de weg ook is en het kan niet worden voltooid, hoe kort de weg ook is, als je niet eens je voetafdruk markeert.