reactive
/ɹiːˈæktɪv/
Proposed by a contributor, not yet supported by evidence.
Sense 1
Meaning · English
That reacts or responds to a stimulus.
Adjective
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Sense 2
Meaning · English
That readily takes part in reactions.
Adjective
Examples
francium is the most reactive of the alkali metals.
Usage example from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01)
Sources & notes
Adapted from English Wiktionary (CC BY-SA 4.0, retrieved 2026-08-01 via kaikki.org).
Common questions
What does “reactive” mean?
That reacts or responds to a stimulus.
Is “reactive” formal or informal?
No register label has been reviewed yet — treat it as neutral and check the usage notes above.