Definitions
beneath the surface of the earth
Word origin
From Middle English undergrounde (adverb), equivalent to under + ground or under- + ground. Compare Dutch ondergrond, ondergronds, German Untergrund, Danish undergrunds.
Used in a sentence
“There is an underground tunnel that takes you across the river.”
“One of the hidden glories of Victorian engineering is proper drains. Isolating a city’s effluent and shipping it away in underground sewers has probably saved more lives than any medical procedure except vaccination.”
“These criminals operate through an underground network.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer1 curated clues
01“Below the surface”11 letters
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