ユニタリータックスMeanings1noununitary taxA tax system where a multinational corporation's global income is combined and taxed as a single entity, often discussed in international tax policy.ユニタリータックスは多た国こく籍せき企き業ぎょうの課か税ぜい方ほう法ほうの一ひとつだ。Unitary tax is one method of taxing multinational corporations.