Underground engine 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

Definitions for Engine


  • (noun) a device that changes energy into mechanical motion
  • (noun) motor that converts thermal energy to mechanical work
  • (noun) a wheeled vehicle consisting of a self -propelled engine that is used to draw trains along railway tracks