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interaction
5 dictionary results for: interaction
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
in·ter·ac·tion       [in-ter-ak-shuhn] Pronunciation Key
–noun
1.reciprocal action, effect, or influence.
2.Physics.
a.the direct effect that one kind of particle has on another, in particular, in inducing the emission or absorption of one particle by another.
b.the mathematical expression that specifies the nature and strength of this effect.
[Origin: 1825–35; inter- + action]

—Related forms
in·ter·ac·tion·al, adjective
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
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American Heritage Dictionary - Cite This Source - Share This
in·ter·ac·tion       (ĭn'tər-āk'shən)  Pronunciation Key 
n.  
    1. The act or process of interacting.
    2. The state of undergoing interaction.
  2. Physics Any of four fundamental ways in which elementary particles and bodies can influence each other, classified as strong, weak, electromagnetic, and gravitational.

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The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Online Etymology Dictionary - Cite This Source - Share This
interaction 
1832, from inter- + action. The verb interact is first attested 1839.

Online Etymology Dictionary, © 2001 Douglas Harper
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WordNet - Cite This Source - Share This
interaction

noun
1. a mutual or reciprocal action; interacting 
2. (physics) the transfer of energy between elementary particles or between an elementary particle and a field or between fields; mediated by gauge bosons 

WordNet® 3.0, © 2006 by Princeton University.
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Webster's Revised Unabridged Dictionary - Cite This Source - Share This

Interaction

In`ter*ac"tion\, n. 1. Intermediate action.

2. Mutual or reciprocal action or influence; as, the interaction of the heart and lungs on each other.

Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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