Having
the power or quality of acting; causing change; communicating action or
motion; acting; -- opposed to passive, that receives; as, certain
active principles; the powers of the mind.
Quick in physical movement; of an agile and
vigorous body; nimble; as, an active child or animal.
In action; actually proceeding; working; in
force; -- opposed to quiescent, dormant, or extinct;
as, active laws; active hostilities; an active
volcano.
Given to action; constantly engaged in action;
energetic; diligent; busy; -- opposed to dull, sluggish,
indolent, or inert; as, an active man of business;
active mind; active zeal.
Requiring or implying action or exertion; --
opposed to sedentary or to tranquil; as, active
employment or service; active scenes.
Given to action rather than contemplation;
practical; operative; -- opposed to speculative or
theoretical; as, an active rather than a speculative
statesman.
Brisk; lively; as, an active demand for
corn.
Implying or producing rapid action; as, an
active disease; an active remedy.
Applied to a
form of the verb; -- opposed to passive. See Active voice,
under Voice.
In celebration of Noah Webster's Birthday (October 16, 2009), we have prepared an updated website. 
