noun
[noncount] the red liquid that flows through the bodies of people and animals
used to say that a person's ancestors were of a particular kind
members of a team, company, or organization - usually used in the phrases new blood or young blood
blood and guts
blood is thicker than water
The saying blood is thicker than water means that a person's family is more important than a person's other relationships or needs.
blood is up
In British English, when you say that someone's blood is up, you mean that someone is angry and wants to fight or argue.
blood on your hands
If someone's blood is on your hands, you are responsible for that person's death.
by blood
by a relationship that connects two people through their natural parents, grandparents, etc.
draw blood
to take blood from a person's body for medical reasons
to cause blood to flow from a person's body
flesh and blood
in cold blood
in a deliberate way :following a plan
in your blood
If something (such as an ability or activity) is in your blood, it is part of your nature and is often shared by your family members.
make someone's blood boil
to make someone very angry
make someone's blood curdle
or make someone's blood run cold
to cause someone to be very afraid or disgusted
out for blood
If you are out for blood or out for someone's blood, you are very angry and you want to kill someone or to cause someone pain or discomfort.
spill/shed blood
to kill people violently
sweat blood
informal :to care a lot about something and work very hard for it
taste blood
informal :to experience pleasure as a result of defeating an opponent
US