おお 大い LinksSentence search for 大いSentence search for おおいSentence search for 大Kanji details for 大Edit in JMdict Archaic/formal form of na-adjective1. big; large; greatArchaism, Only applies to 大い, See also 大いなる, See also 大いにPrefix2. greater (of equal court ranks); upper; seniorArchaism, See also 従 ひろい, also written as 正Other forms大 【おおい】 Discussions Log in to talk about this word.