1 day ago · The meaning of REACTION is the act or process or an instance of reacting. How to use reaction in a sentence.

Reaction Time Test When the red box turns green, click as quickly as you can. Click anywhere to start. Statistics About the test This is a simple tool to measure your reaction time. The average (median) …

May 31, 2026 · Synonyms for REACTION: response, answer, take, reply, backlash, reflex, revulsion, recoil; Antonyms of REACTION: action, effect, behavior, cause

May 25, 2026 · A chemical reaction is a process in which one or more substances, the reactants, are converted to one or more different substances, the products. Substances are either chemical …

REACTION definition: a reverse movement or tendency; an action in a reverse direction or manner. See examples of reaction used in a sentence.

REACTION definition: 1. behaviour, a feeling or an action that is a direct result of something else: 2. someone's…. Learn more.

Define reaction. reaction synonyms, reaction pronunciation, reaction translation, English dictionary definition of reaction. n. 1. a. A response to a stimulus. b. The state resulting from such a response. …

Online reaction time test. Click as soon as the field turns green. Average and best time, attempts, CSV export, and built‑in self‑tests.

Reaction Look up in Wiktionary, the free dictionary. Reaction may refer to a process or to a response to an action, event, or exposure.

5 days ago · The meaning of REACT is to exert a reciprocal or counteracting force or influence —often used with on or upon. How to use react in a sentence.