re·act verb \rē-ˈakt\
: to behave or change in a particular way when something happens, is said, etc.
of a chemical substance : to change after coming into contact with another substance
medical : to be affected by a drug, food, etc., in usually a bad way
: to exert a reciprocal or counteracting force or influence —often used with on or upon
: to change in response to a stimulus
: to act in opposition to a force or influence —usually used with against
: to move or tend in a reverse direction
Examples of REACT
- When I told her what happened, she reacted with anger.
- I didn't expect him to react that way.
- The firefighters reacted quickly when they heard the alarm.
- He reacted badly to the drug.
Origin of REACT
New Latin reactus,
past participle of reagere,
from Latin re-
to act — more at agent
First Known Use: 1644
Rhymes with REACT
, class act
, sex act
re·act intransitive verb \rē-ˈakt\ (Medical Dictionary)
: to respond to a stimulus
: to undergo chemical reaction
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