Definition of reactive
- reactive depression
The government's response to the problem was reactive rather than proactive.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'reactive.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
: done in response to a problem or situation : reacting to problems when they occur instead of doing something to prevent them
chemistry : tending to change into something else when mixed with another substance
What made you want to look up reactive? Please tell us where you read or heard it (including the quote, if possible).
subject to rapid or unexpected change
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