An incident of bleeding, as in haemophilia.
"After his minor scrape, the doctor warned that if he has hemophilia, even such a small cut could cause him to bleed excessively for hours."
lose blood from one's body
"After falling down the stairs, he sat on the curb to clean up where his knee was bleeding heavily."
draw blood
"In the old days, doctors routinely bled patients as part of the treatment"
get or extort (money or other possessions) from someone
"They bled me dry--I have nothing left!"
To lose blood through an injured blood vessel.
"The paper cut on my finger started to bleed, so I pressed a bandage against it until the flow stopped."
The word "bleed" comes from Old English, where it originally meant to lose blood. Its roots trace back to Proto-Germanic terms for both the action of bleeding and the substance of blood itself.