Bleeding, profuse discharge of blood from blood vessels.
The loss of a large quantity of blood, especially from a burst blood vessel.
The escape of blood from a blood vessel, normally in response to some trauma, or as a result of a clotting disorder such as haemophilia. The bleeding may be external and follow, for example, a skin laceration; or it may be internal and result from, for example, haematemesis (bleeding into the stomach), haemoptysis (bleeding from the lungs), or haematuria (bleeding from the kidneys or urinary tract).