[ kohld-bluhd-id ]
See synonyms for: cold-bloodedcold-bloodedness on

  1. designating or pertaining to animals, as fishes and reptiles, whose blood temperature ranges from the freezing point upward, in accordance with the temperature of the surrounding medium; poikilothermic.

  2. without emotion or feeling; dispassionate; cruel: a cold-blooded murder.

  1. sensitive to cold.

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Origin of cold-blooded

First recorded in 1585–95

Other words from cold-blooded

  • cold-blood·ed·ly, adverb
  • cold-blood·ed·ness, noun

Words Nearby cold-blooded Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use cold-blooded in a sentence

  • It wasn't any scruple of mercy, for Hicks was as cold-blooded a brute as ever glanced down a gun-barrel.

    Raw Gold | Bertrand W. Sinclair
  • How dare you decide in this cold-blooded way whether I am to be called—ah—Tosh—or—ah—Porker!

    First Plays | A. A. Milne
  • If all the world did not wag his way, so much the worse for cold-blooded mercenary superfluous beings.

    Ancestors | Gertrude Atherton
  • He had fired, remembering that cold-blooded slaughter at the Weedham Industries plant.

  • Good heavens, Odin thought, what a cold-blooded obituary for any race!

    Hunters Out of Space | Joseph Everidge Kelleam

British Dictionary definitions for cold-blooded


  1. having or showing a lack of feeling or pity: a cold-blooded killing

  2. informal particularly sensitive to cold

  1. (of all animals except birds and mammals) having a body temperature that varies with that of the surroundings: Technical term: poikilothermic

Derived forms of cold-blooded

  • cold-bloodedly, adverb
  • cold-bloodedness, noun

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for cold-blooded


[ kōldblŭdĭd ]

  1. Having a body temperature that changes according to the temperature of the surroundings. Fish, amphibians, and reptiles are cold-blooded.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.