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[blee-der] /ˈbli dər/
a person who bleeds abnormally because of low clotting rate; hemophiliac.
a person or animal that bleeds easily, especially an athlete or racehorse.
a person who draws blood from a sick person; phlebotomist.
Slang. a person who drains another of money, resources, etc.; parasite or usurer.
Metallurgy. an ingot or casting from which some metal has escaped.
Also called bleeder resistor. Electricity. a resistor that is connected across a power supply for voltage regulation and to dissipate the charge remaining in capacitors when the power is discontinued.
Also called bleeder valve. a valve or opening for draining a tank, tubing, etc.
British Slang.
  1. a despicable person.
  2. a person, especially a man; fellow.
Origin of bleeder
1780-90; bleed + -er1 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for bleeder
  • The panel was ventilated by a flow-through bleeder system with multiple bleeder entries at the rear of the panel.
  • The panel was ventilated by a flow-through bleeder system that included multiple bleeder entries.
  • bleeder entries are established around the perimeter of a set of longwall panels and are used to control methane liberation.
  • The operator may elect to show information required for bleeder maps on the annual map also.
  • The bleeder entries at the back end of the gob are represented as one entry connecting to the bleeder fan for modeling purposes.
  • The purpose of the bleeder device is to indicate that the water is running and should be shut off to prevent hot water migration.
  • Attach air cylinders to fill station, close bleeder valves, open cylinder and fill station valves slowly.
  • bleeder systems are ventilation networks used to ventilate pillared areas in underground coal mines.
  • The bleeder valve may show good production, but no liquid travels to the tank battery.
  • If the problem is in the pump, it may be determined by first opening the tubing bleeder valve while the unit is pumping.
British Dictionary definitions for bleeder


  1. (derogatory) a despicable person: a rotten bleeder
  2. any person; fellow: where's the bleeder gone?
(pathol) a nontechnical name for a haemophiliac
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
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Word Origin and History for bleeder

1756, "one who lets blood," agent noun from bleed (v.). As "one with hemophilia," from 1803.

Online Etymology Dictionary, © 2010 Douglas Harper
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bleeder in Medicine

bleeder bleed·er (blē'dər)

  1. A person, such as a hemophiliac, who bleeds freely or is subject to frequent hemorrhages.

  2. A blood vessel from which there is uncontrolled bleeding.

  3. A blood vessel severed by trauma or surgery that requires cautery or ligature to arrest the flow of blood.

  4. A person who draws blood from another; a phlebotomist.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Slang definitions & phrases for bleeder


  1. A lucky or weak base hit; blooper, texas leaguer (1930s+ Baseball)
  2. A hemophiliac (1800+)

The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D.
Copyright (C) 2007 by HarperCollins Publishers.
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