Underground system Synonyms

Underground replaced

Definitions for Underground


  • (adjective) undertaken or done so as to escape being observed or known by others
  • (adjective) being, situated, or operating beneath the surface of the earth
  • (noun) a secret organization in a conquered country fighting against enemy forces

Synonyms for phrase

US abbreviation

US is an abbreviation for Underground System
What does US stand for?
US stands for "Underground System"

System replaced

Definitions for System


  • (noun) something made up of many interdependent or related parts
  • (noun) a method worked out in advance for achieving some objective
  • (noun) the means or procedure for doing something