A2adjective2K

Underground

UK /["/ˌʌndəˈɡraʊnd/"]/US /["/ˌʌndərˈɡraʊnd/"]/

Definition

under the surface of the ground

In simple words: Below the ground or not visible on the surface.

Examples

  • an underground bunker/tunnel
  • underground parking
  • an underground car park
  • underground passages/caves/streams
  • underground cables
  • They carried out a series of underground nuclear tests.
  • an underground resistance movement
  • The changes will affect all workers, whether underground or legal.
  • The party was originally formed as an underground organization in 1987.

Usage notes

Used in contexts like transportation (e.g., underground trains), culture (e.g., underground music), or geography. Not usually used in formal writing when referring to topics above ground.

Grammar pattern

standalone adjective or noun

Memory hint

Think of an 'underground tunnel' where trains travel below the earth.

Collocations

  • underground movement
  • underground station
  • underground economy
  • underground music

Synonyms

  • subterranean
  • below surface
  • hidden

Antonyms

  • above ground
  • visible

Common mistakes

  • Confused with 'under ground' as two separate words.
  • Overused in contexts where 'hidden' or 'not mainstream' might be more appropriate.
  • Omitting the context when referring to 'underground movements.'