Wordcyclopedia | English | underground brine

underground Adjective

— of or about being under the ground Underground water is drying up. — secret or not well known The underground music scene is really interesting. Underground drug sales have increased over the last year.

underground Preposition

— being or moving under the ground Let's go underground. It's safer down there. The new trains will run underground. — If you go underground, you keep your activities secret.

underground Noun

— The underground is a system of trains that runs mostly under the ground. The London underground is a great way to move about the city.