What is the meaning of Underground?

(n.) The place or space beneath the surface of the ground; subterranean space.
(a.) Being below the surface of the ground; as, an underground story or apartment.
(adv.) Beneath the surface of the earth.
(a.) Done or occurring out of sight; secret.

Webster's Revised Unabridged Dictionary

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APA	Webster's. (2011). underground. Retrieved September 21, 2026, from http://smartdefine.org/underground/definitions/2076671
Chicago	Webster's. 2011. "underground" http://smartdefine.org/underground/definitions/2076671 (accessed September 21, 2026).
Harvard	Webster's 2011, underground, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/underground/definitions/2076671>.
MLA	Webster's. "underground" 28 May 2011. Web. 21 September 2026. <http://smartdefine.org/underground/definitions/2076671>

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