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The Collaborative International Dictionary of English v.0.48 (gcide)

React \Re*act"\ (r[=e]*[a^]kt"), v. t.
To act or perform a second time; to do over again; to
reenact; as, to react a play; the same scenes were reacted at
Rome.
[1913 Webster]


React \Re*act"\ (r[-e]*[a^]kt"), v. i.
1. To return an impulse or impression; to resist the action
of another body by an opposite force; as, every body
reacts on the body that impels it from its natural state.
[1913 Webster]

2. To act upon each other; to exercise a reciprocal or a
reverse effect, as two or more chemical agents; to act in
opposition.
[1913 Webster]