[ bluhd ]
/ blʌd /
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Definition of blood

verb (used with object)
Hunting. to give (hounds) a first sight or taste of blood.Compare flesh (def. 14).
to stain with blood.


The Story Behind The Blood Drop Emoji

The blood drop emoji, also called the period emoji, has a very interesting origin story. Do you know who thought of the idea to create it?

"Is" it time for a new quiz? "Are" you ready? Then prove your excellent skills on using "is" vs. "are."
Question 1 of 7
IS and ARE are both forms of which verb?

Idioms about blood

Origin of blood

First recorded before 1000; Middle English blo(o)d, Old English blōd; cognate with Old Frisian, Old Saxon blōd, Old High German bluot (German Blut ), Old Norse blōth, Gothic bloth, from Germanic blōdam


bloodlike, adjective


bled, bleed, blood
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022


What is a basic definition of blood?

Blood is a vital bodily fluid pumped through the veins and arteries by the heart. Blood also refers to people who provide energy, to a tendency a person has, or to a person’s ancestry. The word blood has several other senses as a noun and a few as a verb.

Blood is the red fluid that flows through your body. It is made of plasma, white blood cells, red blood cells, and platelets. Blood carries oxygen and other important nutrients throughout the body. It also carries waste, such as carbon dioxide, to the lungs, kidneys, and liver to be removed. Blood is a major component of the circulatory system, which also includes the heart, veins, arteries, and lymph nodes. The verbs bleed and bled mean to ooze, leak, or exude blood.

  • Real-life examples: You are filled with blood. If you cut your hand, blood will flow out of the wound. A blood drive is an event where people are encouraged to donate blood to a hospital or medical organization. A blood transfusion is taking blood from one living thing and injecting it into another.
  • Used in a sentence: The butcher‘s smock was covered with pig’s blood.

Blood is also used to refer to people who provide energy, spirit, or vigor to something.

  • Real-life examples: Companies, clubs, or sports teams often look for new members, referred to as young blood or new blood, to provide new energy when they are stuck in a rut.
  • Used in a sentence: The basketball team started seeing success thanks to the new blood the rookies provided.

Blood is also used to mean a tendency or natural proficiency a person has that is seemingly based on their culture or background. This sense usually takes the form of in the blood.

  • Real-life examples: A family that has many members become amazing painters might say they have painting in their blood. Similarly, a son or daughter of a famous swimmer may state that swimming is in their blood when they attempt to become famous swimmers as well.
  • Used in a sentence: I come from a long line of bakers. Baking is in my blood!

Blood can also refer to people having a common ancestor or a shared heritage. The term bloodline also refers to this idea.

  • Real-life examples: Your parents, siblings, cousins, and grandparents are your blood relatives. You all have a common ancestor that you descend from. If you have a brother-in-law or a stepmother, they are related to you by marriage rather than by blood.
  • Used in a sentence: She has two brothers by blood and one by marriage.

Where does blood come from?

The first records of blood come from before the year 1000. It comes from the Old English blōd. It is related to words for the red liquid in several other languages, such as the Old High German bluot and the Old Norse blōth.

Did you know … ?

What are some other forms related to blood?

  • bloodlike (adjective)

What are some synonyms for blood?

What are some words that share a root or word element with blood

What are some words that often get used in discussing blood?

How is blood used in real life?

Blood is a common word. It is most often used to literally or figuratively refer to the vital bodily fluid.



Try using blood!

True or False?

Blood is an unimportant fluid that the body occasionally produces.

How to use blood in a sentence

British Dictionary definitions for blood (1 of 2)

/ (blʌd) /

verb (tr)

Word Origin for blood

Old English blōd; related to Old Norse blōth, Old High German bluot

British Dictionary definitions for blood (2 of 2)

/ (blʌd) /

Thomas, known as Colonel Blood . ?1618–80, Irish adventurer, who tried to steal the crown jewels (1671)
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

Medical definitions for blood

[ blŭd ]

The fluid consisting of plasma, red blood cells, white blood cells, and platelets that is circulated by the heart through the arteries and veins, carrying oxygen and nutrients to and waste materials away from all body tissues.
One of the four humors of ancient and medieval physiology, identified with the blood found in the blood vessels, and believed to cause cheerfulness.
Descent from a common ancestor; parental lineage.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for blood

[ blŭd ]

The fluid tissue that circulates through the body of a vertebrate animal by the pumping action of the heart. Blood is the transport medium by which oxygen and nutrients are carried to body cells and waste products are picked up for excretion. Blood consists of plasma in which red blood cells, white blood cells, and platelets are suspended.
A fluid that is similar in function in many invertebrate animals.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Cultural definitions for blood


The fluid circulating through the heart, arteries, veins, and capillaries of the circulatory system. Blood carries oxygen and nutrients to the cells of the body and removes waste materials and carbon dioxide. It is composed of plasma (mainly water, but with a mixture of hormones, nutrients, gases, antibodies, and wastes), red blood cells (which carry oxygen), white blood cells (which help combat infection), and platelets (which help the blood clot).

The New Dictionary of Cultural Literacy, Third Edition Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Other Idioms and Phrases with blood


The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.