A bleeding nose means your nostrils are oozing out blood.
When someone talks about their period being heavy and bleeding heavily, they mean that they're losing a lot of blood during those days each month. This often happens because it's a time when a woman's body is getting ready for the possibility of pregnancy, but if it doesn't happen, her uterus sheds its lining – which results in bleeding.
How common is "bleeding"?
Word bleeding is considered uncommon in modern English. It has a balanced usage among all categories: speech, fiction, newspapers and academic texts.
Definitions
verb
(of a person or animal) To lose blood through an injured blood vessel.
Example: If her nose bleeds, try to use ice.
To let or draw blood from.
To take large amounts of money from.
To steadily lose (something vital).
Example: The company was bleeding talent.
(of an ink or dye) To spread from the intended location and stain the surrounding cloth or paper.
Example: Ink traps counteract bleeding.
To remove air bubbles from a pipe containing other fluids.
To bleed on; to make bloody.
To show one's group loyalty by showing (its associated color) in one's blood.
Example: He was a devoted Vikings fan: he bled purple.
To lose sap, gum, or juice.
Example: A tree or a vine bleeds when tapped or wounded.
To issue forth, or drop, like blood from an incision.
(of a phonological rule) To destroy the environment where another phonological rule would have applied.
Example: Labialization bleeds palatalization.
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noun
The flow or loss of blood from a damaged blood vessel.
Example: Internal bleeding is often difficult to detect and can lead to death in a short time.
Bloodletting.
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adjective
Losing blood
(intensifier) extreme, outright; see also bloody (sense 3).
Example: "You are a bleeding liar. Truth is of no interest to you at all." — http//groups-beta.google.com/group/comp.software.year-2000/msg/ba82c9dd28cde368
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adverb
Used as an intensifier: Extremely.
Example: His car's motor is bleeding smoking down the motorway.