Heavier-than-air machine Synonyms

Heavier-than-air replaced

Definitions for Heavier-than-air


  • (adjective) relating to an aircraft heavier than the air it displaces

Synonyms for phrase

HM abbreviation

HM is an abbreviation for Heavier-than-air Machine
What does HM stand for?
HM stands for "Heavier-than-air Machine"

Definitions for Machine


  • (noun) a device that changes energy into mechanical motion
  • (noun) a self -propelled passenger vehicle on four wheels
  • (noun) any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks