Active

1. Having the power or quality of acting; causing change; communicating action or motion; acting;—opposed to passive, that receives.

Synonym: actingAntonym: passive

2. Quick in physical movement; of an agile and vigorous body; nimble.

Synonyms: agile, nimbleAntonyms: passive, indolent, still

3. In action; actually proceeding; working; in force

Synonyms: in action, working, in forceAntonyms: quiescent, dormant, extinct

1. 1. (specifically, of certain geological features, such as volcano, geysers, etc) Emitting hot materials, such as lava, smoke, or steam, or producing tremors.
2. Given to action; constantly engaged in action; energetic; diligent; busy

Synonyms: busy, deedful, diligent, energeticAntonyms: dull, sluggish, indolent, inert

5. Requiring or implying action or exertion

Synonym: operativeAntonyms: passive, tranquil, sedentary

6. Given to action rather than contemplation; practical; operative

Antonyms: theoretical, speculative

7. Brisk; lively.
8. Implying or producing rapid action.

Antonyms: passive, slow

9. (heading, grammar) About verbs.
   1. Applied to a form of the verb; — opposed to passive. See active voice.
   2. Applied to verbs which assert that the subject acts upon or affects something else; transitive.
   3. Applied to all verbs that express action as distinct from mere existence or state.
10. (computing, of source code) Eligible to be processed by a compiler or interpreter.
11. (electronics) Not passive.
12. (gay sexual slang) (of a homosexual man) enjoying a role in anal sex in which he penetrates, rather than being penetrated by his partner.Synonym: topAntonyms: passive, bottom