|a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.|
|a chattering or flighty, light-headed person.|
|1.||readily partaking in chemical reactions: sodium is a reactive metal; free radicals are very reactive|
|2.||of, concerned with, or having a reactance|
|3.||responsive to stimulus|
|4.||(of mental illnesses) precipitated by an external cause: reactive depression|
reactive re·ac·tive (rē-āk'tĭv)
Tending to be responsive or to react to a stimulus.
Characterized by reaction.
Tending to participate readily in chemical reactions.