below the surface of the ground: an underground railway; an underground stream.
az: yeraltı
ru: подземный
♦ adverb
1 (to a position) under the surface of the ground: Rabbits live underground.
az: yerin altında
ru: под землёй
2 into hiding: He will go underground if the police start looking for him.
az: gizli yer
ru: в подполье
♦ [ˈandəgraund] noun
(British) an underground railway; subway (American): She hates travelling by/on the underground.
az: metro
ru: метро