Cambridge Dictionaries online Cambridge Dictionaries online

The most popular online dictionary and thesaurus for learners of English

  

underground

adjective, adverb (BELOW EARTH)
 
 
/ˌʌn.dəˈɡraʊnd/ US  /-dɚ-/

Definition

B2 below the surface of the Earth; below ground: an underground cave/passage/cable Moles live underground.The Earth and outer space - general words
(Definition of underground adjectiveadverb (BELOW EARTH) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
Focus on the pronunciation of underground