Meaning of REACTION in English


n.1 the act or an instance of reacting; a responsive or reciprocal action.

2 a a responsive feeling (what was your reaction to the news?). b an immediate or first impression.

3 the occurrence of a (physical or emotional) condition after a period of its opposite.

4 a bodily response to an external stimulus, e.g. a drug.

5 a tendency to oppose change or to advocate return to a former system, esp. in politics.

6 the interaction of substances undergoing chemical change.

7 propulsion by emitting a jet of particles etc. in the direction opposite to that of the intended motion.


reactionist n. & adj.

Etymology: REACT + -ION or med.L reactio (as RE-, ACTION)

Oxford English vocab.      Оксфордский английский словарь.