Is it farther or further?


[in-ter-ak-shuh n] /ˌɪn tərˈæk ʃən/
reciprocal action, effect, or influence.
  1. the direct effect that one kind of particle has on another, in particular, in inducing the emission or absorption of one particle by another.
  2. the mathematical expression that specifies the nature and strength of this effect.
1825-35; inter- + action
Related forms
interactional, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for interactions
  • But, for those who know what they are looking for, this specimen bears the traces of ancient interactions between dinosaurs.
  • Beer's matching with food is extremely complex and many interactions are contained within the felicity of food and beer.
  • Any manager realizes that the projects involve many balances and interactions.
  • She wanted us to have ladylike interactions with all who surrounded us.
  • His art has mainly to do with social experiences and interactions, not painting or sculpture.
  • Be sure to mention any medications you are taking so any possible serious drug interactions can be avoided.
  • His interactions with lawyers are notoriously aggressive.
  • Billy's early interactions with other children proved difficult, because his consciousness was so much more developed.
  • Drug interactions, too, might alter testosterone levels in unpredictable ways.
  • Social scientists create maps of online interactions.
British Dictionary definitions for interactions


a mutual or reciprocal action or influence
(physics) the transfer of energy between elementary particles, between a particle and a field, or between fields See strong interaction, electromagnetic interaction, fundamental interaction, gravitational interaction, weak interaction, electroweak interaction
Derived Forms
interactional, adjective
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 interactions



1812, from inter- + action.

Online Etymology Dictionary, © 2010 Douglas Harper
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