Definition of thinking machine in US English:

thinking machine

noun

  • 1A person regarded as a machine with intellectual powers; a person whose thinking consists (merely) in mechanical response to symbols.

  • 2A machine able to simulate thought; (informal) a computer.

Origin

Late 17th century; earliest use found in Thomas Tenison (1636–1715), archbishop of Canterbury. From either thinking or thinking + machine.

Pronunciation

thinking machine

/ˈθɪŋkɪŋ məˌʃiːn/