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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. 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.

  7. 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:

  8. 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.

  9. Definition of underground adjective in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

  10. underground meaning, definition, what is underground: below the surface of the earth: Learn more.

  11. UNDERGROUND definition: 1. under the surface of the ground: 2. Underground political activities are secret and illegal…. Learn more.