We found 2 dictionaries that define the word plane figures:

General (2 matching dictionaries)

1. plane figures: Merriam-Webster
2. plane figures: Vocabulary.com

(Note: See plane_figure as well.)

Definitions from WordNet (plane figure) ▸ noun:  a two-dimensional shape ▸ Also see plane_figure ▸ Words similar to plane figures ▸ Usage examples for plane figures ▸ Idioms related to plane figures ▸ Wikipedia articles (New!) ▸ Words that often appear near plane figures ▸ Rhymes of plane figures ▸ Invented words related to plane figures