war machine is a noun meaning "the military forces of a nation". It carries one recorded sense.
the military forces of a nation
“their military is the largest in the region”
“the military machine is the same one we faced in 1991 but now it is weaker”
Definitions, synonyms and semantic relations for war machine come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.