rapidreaction

noun
UK /ˌræpɪd rɪˈækʃən/
US /ˌræpɪd riˈækʃən/

A very fast response to something that happens.

The goalkeeper's rapidreaction saved the ball from going into the net.


OTHER MEANINGS

2. A chemical change that happens very quickly.

The rapidreaction in the lab produced a bright flash of light.

3. A fast reply or answer given without delay.

Her rapidreaction to the email impressed her manager.

4. A sudden and quick emotional or physical response to a situation.

His rapidreaction to the loud noise was to jump back.