こうおん 洪恩 LinksSentence search for 洪恩Sentence search for こうおんSentence search for 鴻恩Kanji details for 洪 and 恩Edit in JMdict Noun1. great debt of gratitude; great obligationSee also 大恩Other forms鴻恩 【こうおん】 Discussions Log in to talk about this word.