オタク Common word LinksSentence search for オタクSentence search for おたくSentence search for ヲタクEdit in JMdict Noun1. otaku; geek; nerd; enthusiastColloquial, See also お宅, from お宅Other formsおたく、ヲタクNotesヲタク: Irregular kana usage. Discussions Log in to talk about this word.