1. a person or thing that ejects.
  2. (in a firearm or gun) the mechanism that after firing throws out the empty cartridge or shell.
  3. Also called eductor. a device for inducing a flow of a fluid from a chamber or vessel by using the pressure of a jet of water, air, steam, etc., to create a partial vacuum in such a way as to entrain the fluid to be removed.
  4. any of various devices for removing work from a machine or die.

Origin of ejector

First recorded in 1630–40; eject + -or2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for ejector


  1. a person or thing that ejects
  2. the mechanism in a firearm that ejects the empty cartridge or shell after firing
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