- reciprocal action, effect, or influence.
- the direct effect that one kind of particle has on another, in particular, in inducing the emission or absorption of one particle by another.
- the mathematical expression that specifies the nature and strength of this effect.
Origin of interaction
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for interaction
Still, after nearly a month at sea, I imagine they are eager to recharge, ready for interaction with the outside world.Inside Sailing’s Biggest Race
October 11, 2014
The Lonely Island are really huge fans of his and have been our whole lives, so any interaction with him is great.Imagine Andy Samberg as Your Best Man
September 29, 2014
Even the tersest of responses on OKCupid is still giving an aggressive user exactly what he wants: interaction.Online Shaming Gives Creeps the Spotlight They Deserve
September 23, 2014
The interaction between Obama and Corker was a tense moment in the otherwise uneventful meeting.Exclusive: Obama Told Lawmakers Criticism of His Syria Policy is 'Horsesh*t'
August 12, 2014
Is it possible that her bad experience with her adult student fatefully colored her perceptions of her interaction with Kopin?Exclusive: Brown University Student Speaks Out on What It’s Like to Be Accused of Rape
June 8, 2014
For it is the action and interaction of these which lie at the bottom of the mind's development.The Mind and Its Education
George Herbert Betts
Awareness of similarities was embodied in means of interaction.
This is made possible by means of interaction and by shared resources.
Art establishes itself on a plurality of levels of interaction.
The acorns had dropped into the friendly soil, and this was the result of their interaction.Fragments of science, V. 1-2
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 interaction
Online Etymology Dictionary, © 2010 Douglas Harper