Definitions from Wiktionary (active)

▸ adjective:  Having the power or quality of acting; causing change; communicating action or motion; acting;—opposed to passive, that receives.
▸ adjective:  Quick in physical movement; of an agile and vigorous body; nimble.
▸ adjective:  In action; actually proceeding; working; in force
▸ adjective:  (specifically, of certain geological features, such as volcano, geysers, etc) Emitting hot materials, such as lava, smoke, or steam, or producing tremors.
▸ adjective:  Given to action; constantly engaged in action; energetic; diligent; busy
▸ adjective:  Requiring or implying action or exertion
▸ adjective:  Given to action rather than contemplation; practical; operative
▸ adjective:  Brisk; lively.
▸ adjective:  Implying or producing rapid action.
▸ adjective:  (heading, grammar) About verbs.
▸ adjective:  Applied to a form of the verb; — opposed to passive. See active voice.
▸ adjective:  Applied to verbs which assert that the subject acts upon or affects something else; transitive.
▸ adjective:  Applied to all verbs that express action as distinct from mere existence or state.
▸ adjective:  (computing, of source code) Eligible to be processed by a compiler or interpreter.
▸ adjective:  (electronics) Not passive.
▸ adjective:  (gay sexual slang) (of a homosexual man) enjoying a role in anal sex in which he penetrates, rather than being penetrated by his partner.
▸ noun:  A person or thing that is acting or capable of acting.
▸ noun:  (electronics) Any component that is not passive. See Passivity (engineering).
▸ Also see active

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