Active

1. a. Applied to all verbs that express action as distinct from mere existence or state.
2. a. 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.
3. a. Quick in physical movement; of an agile and vigorous body; nimble; as, an active child or animal.
4. a. In action; actually proceeding; working; in force; — opposed to quiescent, dormant, or extinct; as, active laws; active hostilities; an active volcano.
5. a. 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.
6. a. Requiring or implying action or exertion; — opposed to sedentary or to tranquil; as, active employment or service; active scenes.
7. a. Given to action rather than contemplation; practical; operative; — opposed to speculative or theoretical; as, an active rather than a speculative statesman.
8. a. Brisk; lively; as, an active demand for corn.
9. a. Implying or producing rapid action; as, an active disease; an active remedy.
10. a. Applied to a form of the verb; — opposed to passive. See Active voice, under Voice.
11. 1a. 1 Applied to all verbs that express action as distinct from mere existence or state.

The word meanings were obtained from OPTED(The Online Plain Text English Dictionary), which is based on “The Project Gutenberg Etext of Webster’s Unabridged Dictionary” which is in turn based on the 1913 US Webster’s Unabridged Dictionary (See Project Gutenburg), as a text file.