[kuh n-den-ser]
  1. a person or thing that condenses.
  2. an apparatus for condensing.
  3. any device for reducing gases or vapors to liquid or solid form.
  4. Optics. a lens or combination of lenses that gathers and concentrates light in a specified direction, often used to direct light onto the projection lens in a projection system.
  5. Electricity. capacitor.

Origin of condenser

First recorded in 1680–90; condense + -er1
Related formsin·ter·con·dens·er, noun Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for condenser

Historical Examples of condenser

British Dictionary definitions for condenser


    1. an apparatus for reducing gases to their liquid or solid form by the abstraction of heat
    2. a device for abstracting heat, as in a refrigeration unit
  1. a lens that concentrates light into a small area
  2. another name for capacitor
  3. a person or device that condenses
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

Word Origin and History for condenser

1680s, agent noun from condense. Given a wide variety of technical uses in late 18c. and 19c.

Online Etymology Dictionary, © 2010 Douglas Harper

condenser in Medicine


  1. An apparatus for cooling a gas in order to convert it to to a liquid.
  2. An instrument for packing a material into a cavity of a tooth.
  3. The simple or compound lens on a microscope that is used to focus light on the specimen under observation.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

condenser in Science


  1. An apparatus used to condense vapor, usually using cooling or pressurization.
  2. See capacitor.
  3. A mirror, lens, or combination of lenses used to gather light and direct it upon an object or through a projection lens.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.