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    un·der·ground

    adverb

    • 1. beneath the surface of the ground: "miners working underground" Similar below groundbelow the surfaceunder the earthin the earth

    adjective

    noun

    • 1. a group or movement organized secretly to work against an existing regime: "I got involved with the French underground" Similar resistance movementresistanceillegal oppositionpartisans
    • 2. a group or movement seeking to explore alternative forms of lifestyle or artistic expression: "the late-sixties underground"

    More definitions, origin and scrabble points

  2. : an unofficial, unsanctioned, or illegal but informal movement or group. especially : a usually avant-garde group or movement that functions outside the establishment.

  3. UNDERGROUND definition: 1. below the surface of the earth; below ground: 2. An underground activity is secret and usually…. Learn more.

  4. noun. the place or region beneath the surface of the ground. ground. an underground space or passage. a secret organization fighting the established government or occupation forces: He fought in the French underground during the Nazi occupation of France.

  5. UNDERGROUND meaning: 1. below the surface of the earth; below ground: 2. An underground activity is secret and usually…. Learn more.

  6. 1. occurring, situated, or used below ground level: an underground tunnel; an underground explosion. 2. secret; hidden: underground activities. adv. 3. going below ground level: the tunnel led underground.

  7. Something that is underground is below the surface of the ground. Solid low-level waste will be disposed of deep underground. The plane hit so hard that one engine was buried 16 feet underground. Synonyms: below ground, in the earth, under the earth, below the surface More Synonyms of underground.

  8. secret or hidden; not openly practiced or engaged in or shown or avowed. noun. an electric railway operating below the surface of the ground (usually in a city) synonyms: metro, subway, subway system, tube. see more. noun. a secret group organized to overthrow a government or occupation force. synonyms: resistance. see more. Cite this entry. Style: