Definition of unpassionate in English:

unpassionate

Pronunciation /(ˌ)ʌnˈpaʃ(ə)nət/ /(ˌ)ʌnˈpaʃənət/

adjective

  • 1Particularly common in 17th century Of a person, disposition, etc.: not susceptible to or influenced by passion or strong emotion; calm, self-possessed; (less neutrally) unfeeling, bloodless.

  • 2Particularly common in 17th century Of action, speech, etc.: not expressive of or characterized by strong emotion; (of an emotion or quality) rational, moderate.

Origin

Late 16th century; earliest use found in Philip Sidney (1554–1586), author and courtier. From un- + passionate.