- tending to react.
- pertaining to or characterized by reaction.
- Electricity. pertaining to or characterized by reactance.
Origin of reactive
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for reactive
These are reactive, not proactive, stances, and they do little to offer substantive solutions.Men Need A Better Men’s Rights Movement
December 16, 2014
The reality is something less proactive than reactive, not an initiative but a condition—a matter of identity.America Is Coming to Terms with Its Racial Past—Let’s Look Ahead Instead
May 22, 2014
The commandos want a single garment made of "reactive" fibers that will allow heating and cooling as temperatures vary.Special Ops’ Weapons Wish List
April 9, 2014
Magid wants loosen the ties that bind up Jewish life together in reactive formations.Shaul Magid's Post-Ethnic Judaism
May 24, 2013
Well, Republicans want to make Democrats fearful and jittery and reactive—appear to be accepting the Republican premise.Reality Vs. 'Reality'
October 23, 2012
They rise and fall together; they are reactive, one upon the other.Rural Life and the Rural School
Succedaneum for Chrysarobin; very active reducer or "reactive."Merck's 1899 Manual
Merck & Co.
The bandolero was languishing in the third reactive stage of malignant cholera.The Wolf Cub
But they had been replaced by an uncontrollable, reactive nausea.Spillthrough
Daniel F. Galouye
But there are many possible tracer rays not reactive to a screen such as I was using.Skylark Three
Edward Elmer Smith
- readily partaking in chemical reactionssodium is a reactive metal; free radicals are very reactive
- of, concerned with, or having a reactance
- responsive to stimulus
- (of mental illnesses) precipitated by an external causereactive depression
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 reactive
Online Etymology Dictionary, © 2010 Douglas Harper
- Tending to be responsive or to react to a stimulus.
- Characterized by reaction.
- Tending to participate readily in chemical reactions.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.