One entry found for react.

Main Entry: re·act
Pronunciation: r-akt
Function: verb
1 : to act or behave in response (as to stimulation or an influence) <the colonists reacted to the tax by boycotting tea>
2 : to oppose a force or influence -- usually used with against <reacted against their unfair treatment>
3 : to go through or cause to go through a chemical reaction