- tending to react
- of, caused by, or showing reaction or reactance
The reactive elements inside a battery can power a lightbulb.
An example of something reactive is a solution that explodes when another substance is poured into it.
- Tending to be responsive or to react to a stimulus.
- Characterized by reaction.
- Chemistry & Physics Tending to participate readily in reactions.
- re·ac′tive·ness re′ac·tiv′i·ty
(comparative more reactive, superlative most reactive)
- The metal is very reactive chemically.
- Iron is very reactive chemically.
- The hydroxyl group is more reactive than in the phenols, the naphthols being converted into naphthylamines by the action of ammonia, and forming ethers and esters much more readily.
- The metal, however, is not in great demand, for it is generally found that sodium, which is cheaper, and, weight for weight, more reactive, will fulfil any purpose for which potassium may be desired.
- - The development of active immunity by the above methods is essentially the result of a reactive process on the part of the cells of the body, though as yet we know little of its real nature.