二大 にだい Meanings Prefix the big two ...; two major ...; two main ... Kanji 二 two. Read as ニ. 大 big. Read as ダイ. Words containing 二大 二大政党 (にだいせいとう) two largest parties 二大政党制 (にだいせいとうせい) two-party system 二大政党主義 (にだいせいとうしゅぎ) two-party system And 1 more. Jinuma: Japanese Dictionary · Word lists