おおつごもり 大晦 LinksSentence search for 大晦Sentence search for おおつごもりSentence search for 大つごもりKanji details for 大 and 晦Edit in JMdict Noun1. the last day of the year; New Year's EveSee also 大晦日Other forms大つごもり 【おおつごもり】 Discussions Log in to talk about this word.