tending to react.
pertaining to or characterized by reaction.
Electricity. pertaining to or characterized by reactance.
- re·ac·tive·ly, adverb
- re·ac·tive·ness, noun
- an·ti·re·ac·tive, adjective
- hy·per·re·ac·tive, adjective
- non·re·ac·tive, adjective
- o·ver·re·ac·tive, adjective
- un·re·ac·tive, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use reactive in a sentence
This turns the iron oxide into a reactive form of iron, which then interacts with another gas that is flooded through the brick to create a thin film of PEDOT, an electrically conductive plastic.Scientists Found a Way to Turn Bricks Into Batteries | Edd Gent | August 17, 2020 | Singularity Hub
The researchers plan to use data collected in this study to determine whether tracking levels of C-reactive protein can also predict whether patients are recovering.A blood test may show which COVID-19 patients steroids will help — or harm | Tina Hesman Saey | July 22, 2020 | Science News
In 198 patients with levels of C-reactive protein of 20 milligrams per deciliter of blood or higher, steroid use reduced the chance of going a ventilator or dying by 77 percent, compared with those not taking the drugs.A blood test may show which COVID-19 patients steroids will help — or harm | Tina Hesman Saey | July 22, 2020 | Science News
Priming the body with antioxidants could help neutralize some of those reactive oxygen species and curb their effects.What will astronauts need to survive the dangerous journey to Mars? | Maria Temming | July 15, 2020 | Science News
High-energy charged particles can cause damage by splintering water molecules in the body into toxic compounds called reactive oxygen species.What will astronauts need to survive the dangerous journey to Mars? | Maria Temming | July 15, 2020 | Science News
These are reactive, not proactive, stances, and they do little to offer substantive solutions.
Oxygen is an extremely reactive chemical, corroding metals, rusting iron, and fueling fires.Why Did It Take So Long For Complex Life To Evolve On Earth? Blame Oxygen. | Matthew R. Francis | November 2, 2014 | THE DAILY BEAST
A big part of this, Zabin says, is teaching men to sit with uncomfortable feelings without becoming reactive.
A month ago there was a narrow reactive approach to ISIS, now there is an evolving, offensive mission.America Has an Unannounced ISIS Strategy, And It Involves Iran | Jacob Siegel | September 6, 2014 | THE DAILY BEAST
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 | John McWhorter | May 22, 2014 | THE DAILY BEAST
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 | Patrick Casey
Must be maneuverable by operators whose reactive time is not fast, but whose judgment and foresight are trustworthy.The Impossible Voyage Home | Floyd L. Wallace
One of the great advantages of this arrangement will be in its reactive effect on the mother.Concerning Children | Charlotte Perkins Gilman
These compounds are insoluble in ether, are non-inflammable and exceedingly reactive.
British Dictionary definitions for reactive
readily partaking in chemical reactions: sodium 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 cause: reactive depression
- reactively, adverb
- reactivity (ˌriːækˈtɪvɪtɪ) or reactiveness, noun
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