ルンルン LinksSentence search for ルンルンSentence search for るんるんEdit in JMdict Na-adjective (keiyodoshi), Adverb (fukushi), Adverb taking the 'to' particle, Suru verb1. (very) happy; euphoric; buoyant; walking on airColloquialWikipedia definition2. LunlunOther formsるんるん Discussions Log in to talk about this word.