an act or instance of ejecting.
the state of being ejected.
something ejected, as lava.

1560–70; < Latin ējectiōn- (stem of ējectiō) a throwing out, equivalent to eject- (see eject) + -iōn- -ion

nonejection, noun
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
eject (ɪˈdʒɛkt)
1.  (tr) to drive or force out; expel or emit
2.  (tr) to compel (a person) to leave; evict; dispossess
3.  (tr) to dismiss, as from office
4.  (intr) to leave an aircraft rapidly, using an ejection seat or capsule
5.  (tr) psychiatry to attribute (one's own motivations and characteristics) to others
[C15: from Latin ejicere, from jacere to throw]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1610s, from L. ejectionem, noun of action from ejicere (see eject). The jet pilot's ejection seat (also ejector seat) is from 1945.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

ejection e·jec·tion (ĭ-jěk'shən)

  1. The act of driving or casting out by physical force from within.

  2. See ejecta.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Some of these alterations are only the ejection of a word for one that appeared
  to him more elegant or more intelligible.
The term jet propulsion refers to the action produced by a reactor to the
  ejection of matter.
Maybe, but he should also remember that deliberately throwing at a batter is
  grounds for ejection.
The ejection of both electrons and alpha particles keeps the electrical charge
  on the spaceship neutral, close to zero.
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