Definition of Active

1. Noun. Chemical agent capable of activity.

Exact synonyms: Active Agent
Generic synonyms: Chemical Agent

2. Adjective. Tending to become more severe or wider in scope. "Active tuberculosis"
Category relationships: Pathology
Similar to: Progressive
Derivative terms: Activeness, Activity
Antonyms: Inactive

3. Noun. The voice used to indicate that the grammatical subject of the verb is performing the action or causing the happening denoted by the verb. "`The boy threw the ball' uses the active voice"
Exact synonyms: Active Voice
Generic synonyms: Voice
Antonyms: Passive Voice

4. Adjective. Engaged in or ready for military or naval operations. "Review the fighting forces"
Exact synonyms: Combat-ready, Fighting
Category relationships: Armed Forces, Armed Services, Military, Military Machine, War Machine
Similar to: Operational
Derivative terms: Activeness, Activity

5. Noun. A person who is a participating member of an organization. "The club issues a list of members, both the actives and the retirees"
Generic synonyms: Individual, Mortal, Person, Somebody, Someone, Soul

6. Adjective. Disposed to take action or effectuate change. "He was active in drawing attention to their grievances"
Attributes: Activeness, Activity
Similar to: Activist, Activistic, Hands-on, Proactive
Derivative terms: Activeness, Activity
Antonyms: Passive

7. Adjective. Taking part in an activity. "The participating organizations"
Exact synonyms: Participating
Similar to: Involved
Derivative terms: Activeness, Activity

8. Adjective. Characterized by energetic activity. "An active man is a man of action"

9. Adjective. Exerting influence or producing a change or effect. "An active ingredient"
Similar to: Activated, Counteractive, Surface-active
Derivative terms: Activeness, Activity
Antonyms: Inactive

10. Adjective. Full of activity or engaged in continuous activity. "An active account"
Similar to: Brisk, Bustling, Busy, Going, Open, Springy
Derivative terms: Activeness, Activity
Antonyms: Inactive

11. Adjective. In operation. "An active tradition"
Exact synonyms: Alive
Similar to: Existent, Existing
Derivative terms: Activeness, Activity, Aliveness

12. Adjective. (of the sun) characterized by an increased occurrence of sunspots and flares and radio emissions.
Category relationships: Astronomy, Uranology
Derivative terms: Activeness, Activity
Antonyms: Quiet

13. Adjective. Expressing that the subject of the sentence has the semantic function of actor:. "Hemingway favors active constructions"
Category relationships: Grammar
Antonyms: Passive

14. Adjective. (used of verbs (e.g. 'to run') and participial adjectives (e.g. 'running' in 'running water')) expressing action rather than a state of being.
Exact synonyms: Dynamic
Category relationships: Grammar
Antonyms: Stative

15. Adjective. (of e.g. volcanos) capable of erupting.
Similar to: Alive, Live
Also: Live
Antonyms: Extinct

16. Adjective. (of e.g. volcanos) erupting or liable to erupt. "Active volcanos"
Category relationships: Vent, Volcano
Attributes: Action, Activeness, Activity
Similar to: Eruptive
Derivative terms: Activeness, Activity
Antonyms: Dormant

17. Adjective. Engaged in full-time work. "Though past retirement age he is still active in his profession"
Similar to: Activated
Derivative terms: Activeness, Activity
Antonyms: Inactive

Definition of Active

1. 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.

Definition of Active

1. Adjective. 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. ¹

2. Adjective. Quick in physical movement; of an agile and vigorous body; nimble; as, an active child or animal. ¹

3. Adjective. In action; actually proceeding; working; in force; — opposed to quiescent, dormant, or extinct. ¹

4. Adjective. 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. ¹

5. Adjective. Requiring or implying action or exertion; — opposed to sedentary or to tranquil; as, active employment or service; active scenes. ¹

6. Adjective. Given to action rather than contemplation; practical; operative; — opposed to speculative or theoretical; as, an active rather than a speculative statesman. ¹

7. Adjective. Brisk; lively; as, an active demand for corn. ¹

8. Adjective. Implying or producing rapid action. ¹

9. Adjective. (grammar) Applied to a form of the verb; — opposed to passive. See active voice. ¹

10. Adjective. (grammar) Applied to verbs which assert that the subject acts upon or affects something else; transitive. ¹

11. Adjective. (grammar) Applied to all verbs that express action as distinct from mere existence or state. ¹

12. Adjective. (qualifier gay sexual slang) (qualifier of a homosexual man) enjoying a role in anal sex in which he penetrates, rather than being penetrated by his partner ¹

13. Noun. A person or thing that is acting or capable of acting. ¹

¹ Source:

Definition of Active

1. a participating member of an organization [n -S]

Medical Definition of Active

1. Characterised by action, not passive, not expectant. (18 Nov 1997)

Lexicographical Neighbors of Active

activating agent
activation analyses
activation analysis
activation energy
activation product
activation record
activator appliances
active acetate
active agent
active air defense
active aldehyde
active anaphylaxis
active application
active birth
active carbon dioxide
active caries
active centre
active citizen
active congestion
active couple

Literary usage of Active

Below you will find example usage of this term as found in modern and/or classical literature:

1. Monographic Medicine by William Robie Patten Emerson, Guido Guerrini, William Brown, Wendell Christopher Phillips, John Whitridge Williams, John Appleton Swett, Hans Günther, Mario Mariotti, Hugh Grant Rowell (1916)
"In an active practice of over thirty ears I have seen but one case. ... This patient never had asthma during the active years of the disease. 6. ..."

2. Dictionary of National Biography: From the Earliest Times to 1900 by George Smith, Leslie Stephen, Sidney Lee (1897)
"Many of the pieces are inspired by an active fancy, and are correct and graceful ... On his retirement in 1870 from active life he was knighted at Windsor. ..."

3. Journal of the American Chemical Society by American Chemical Society (1879)
"Numbers 1-6 refer to the designation of isomers in Table IV. vious argument that the difference between contact shifts of diastereoisomers of the R-active ..."

4. The Phi Delta Kappan by Phi Delta Kappa (1916)
"Any man upon whom active, associate, or honorary membership shall have been conferred by an active Chapter of Phi Delta Kappa shall be eligible to ..."

5. The Sounds and Inflections of the Greek Dialects: Ionic by Herbert Weir Smyth (1894)
"605-632 Passive (fl verb) . . . 633-636 Contract Verbs, remarks . 637 active 638-668 Middle 669-685 Kote on ft, ftt 686 Kote on хра"М<" . ..."

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