[1] : The Collaborative International Dictionary of English v.0.48

unemotional \unemotional\
   see emotional.
see also:
emotional 

[2] : WordNet (r) 2.0

unemotional
     adj 1: unsusceptible to or destitute of or showing no emotion ant:
             emotional
     2: cool and formal in manner syn: reserved, restrained, reticent
see also:
emotional reserved restrained reticent 

[3] : Moby Thesaurus II by Grady Ward, 1.0

58 moby thesaurus words for "unemotional":
   affectless, anesthetized, arctic, autistic, blunt, callous,
   catatonic, chill, chilly, cold, cold as charity, cold-blooded,
   coldhearted, cool, dispassionate, drugged, dull, emotionally dead,
   emotionless, frigid, frosted, frosty, frozen, glacial, hard-boiled,
   hardhearted, heartless, icy, immovable, impassible, impassive,
   indifferent, inexcitable, insusceptible, nonemotional, obdurate,
   objective, obscure, obtuse, out of touch, passionless,
   self-absorbed, soulless, spiritless, unaffectionate,
   uncompassionate, unemphatic, unfeeling, unimpassioned,
   unimpressionable, unloving, unnoticeable, unpassionate,
   unresponding, unresponsive, unsusceptible, unsympathetic,
   untouchable

Unemotional >> U Words
Unemotional, definition of term: Unemotional
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