同一平面 どういつへいめん Meanings Noun same plane; same level の-adjective flush (with); even (with) Kanji 同 same. Read as ドウ. 一 one. Read as イツ. 平 flat. Read as ヘイ. 面 face. Read as メン. Words containing 同一平面 同一平面上 (どういつへいめんじょう) coplanar Jinuma: Japanese Dictionary · Word lists