COLD-BLOODED Meaning of COLD-BLOODED in English a. 1.Having cold blood.2.Unfeeling, apathetic, cold-hearted. See cold , 4.3.Deliberate, calculating, calculated, heartless, unrelenting, relentless, remorseless, cruel. Soule. Dictionary of English synonyms. Словарь английских синонимов. 2012