Definition of cold-blooded
- cold-blooded murder
callous, case-hardened, compassionless, desensitized, hard, hard-boiled, hard-hearted, heartless, indurate, inhuman, inhumane, insensate, insensitive, ironhearted, merciless, obdurate, pitiless, remorseless, ruthless, soulless, stony (also stoney), take-no-prisoners, thick-skinned, uncharitable, unfeeling, unmerciful, unsparing, unsympathetic;
: showing no sympathy or mercy : done in a planned way without emotion
: based on facts : not affected by emotions
biology : having cold blood : having a body temperature that is similar to the temperature of the environment
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