Underground labs 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

UL abbreviation

UL is an abbreviation for Underground Labs
What does UL stand for?
UL stands for "Underground Labs"