Of a person, disposition, etc.: not susceptible to or influenced by passion or strong emotion; calm, self-possessed; (less neutrally) unfeeling…

Free from the influence of passion or strong emotion; calm, composed, cool; impartial. Said of persons, their faculties, and actions.

Devoid of natural or expected feeling or affection; unnatural. Obsolete.

As the characteristic of inanimate things: without sensation, consciousness, thought, or feeling. Now chiefly Philosophy.

Lacking passion, without passion.

Free from or lacking in passion or strong emotion; dispassionate. Cf. unpassionate, adj.

Dispassionate. Cf. unpassionate, adj.

Free from, or not governed by, passion; calm, dispassionate.

transitive. To free from passion. Chiefly in participial adj. disˈpassioned adj.

Devoid of feeling; without emotion or sensation.

Belonging to or characteristic of person who is of a higher rank, status, or position; befitting one who is superior (in senses A. 6 A. 7). Also…

(un-, prefix1 affix 2.)

That does not throb; without throbbing; without or devoid of feeling or emotion.

Of the nature of an apathist; unemotional.

Without emotion; devoid of feeling or passion.

(un-, prefix1 affix 3.)

Expressing or connoting neither praise nor disapproval.

lacking passion or emotion; cold-hearted; (also) cowardly.

(un-, prefix1 affix 1.)

Freed or free from passion; dispassionate.

Without impression; void of impressions; unimpressible.

(un-, prefix1 affix 1)

Without sentiment.