おんおん LinksSentence search for おんおんEdit in JMdict Adverb taking the 'to' particle, Adverb (fukushi)1. bawling; cryingRare term, Onomatopoeic or mimetic wordいま今までひとまえ人前でな泣いたことのなかった二郎が、オンオンとなきだ泣き出した。Jiro, who had never cried in front of anyone before, started bawling. Discussions Log in to talk about this word.