react
nounEtymology From re- + act. Piecewise doublet of redact.
1
Internet An emoji used to express a reaction to a post on social media.
- Sad reacts only
react
verb/ɹiːˈækt/
Etymology From re- + act. Piecewise doublet of redact.
1
To act in response.
- How did she react to the news?
2
Archaic To act or perform a second time; to do over again; to reenact.
- It is somewhat extraordinary, that the offence for which James II, was expelled, that of setting up power by assumption, should be re-acted, under another shape and form, by the parliament that expelled him.1791, Thomas Paine, Rights of Man:
3
Natural sciences, Physical sciences, Physics To return an impulse or impression; to resist the action of another body by an opposite force
- Every body reacts on the body that impels it from its natural state.
4
Chemistry, Natural sciences, Physical sciences To act upon each other; to exercise a reciprocal or a reverse effect, as two or more chemical agents; to act in opposition.
5
Chemistry, Natural sciences, Physical sciences To cause chemical agents to react; to cause one chemical agent to react with another.
6
Internet To post a reaction (icon or emoji indicating how one feels about a posted message).
- Derived terms
- autoreact, backreact, crossreact, hyperreact, immunoreact, immunoreacted, misreact, nonreacted, overreact, reactability, reactable, reactance, react Anderson, react Andy, reactant, reacter, reactive, reactogenic, reactome, reactor, underreact, unreact, unreacted, wrench react
- Related terms
- interreact, interreaction