Underground door 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

UD abbreviation

UD is an abbreviation for Underground Door
What does UD stand for?
UD stands for "Underground Door"

Door replaced

Definitions for Door


  • (noun) a barrier by which an entry is closed and opened
  • (noun) the opening through which one can enter or leave a structure
  • (noun) the means or right of entering or participating in