Underground underlying Synonyms

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

UU abbreviation

UU is an abbreviation for Underground Underlying
What does UU stand for?
UU stands for "Underground Underlying"

Underlying replaced

Definitions for Underlying


  • (adjective) of or relating to the simplest facts or theories of a subject
  • (adjective) in the nature of something though not readily apparent
  • (adjective) being or involving basic facts or principles