Click anywhere to start. This is a simple tool to measure your reaction time. The average (median) reaction time is 273 milliseconds, according to the data collected so far. In addition to measuring …

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

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

His art is a reaction against photographic realism. A reaction can also be an unpleasant effect on the body resulting from something eaten or taken, such as a drug. A chemical reaction is the change that …

Whether you’re a teacher or a learner, Vocabulary.com can put you or your class on the path to systematic vocabulary improvement. A reaction is an action taken in response to something. If you're …

Your reaction to something that has happened or something that you have experienced is what you feel, say, or do because of it. The initial reaction of most participants is fear. He was surprised that his …

reaction is formed within English, by derivation; probably modelled on a Latin lexical item. Etymons: re- prefix, action n.