モノマニアックモノマニアックMeanings1na-adjectivemonomaniac; obsessive about one thingDescribes a person or behavior obsessively focused on a single subject or idea. Often used as a な-adjective.彼かれは鉄てつ道どうに関かんしてはモノマニアックだ。He is monomaniacal when it comes to railways.
