| 释义 |
WordReference Random House Learner's Dictionary of American English © 2024ac•tive /ˈæktɪv/USA pronunciation adj. - engaged in action or activity:an active life.
- being in existence, progress, or motion: active hostilities.
- marked by energetic involvement:active support.
- involving physical exertion:active sports.
- characterized by current activity, participation, or use:an active club member; an active bank account.
- having a great deal of vigorous activity:an active stock market.
- (of a chemical) effective;
capable of producing an effect:Active ingredients in that toothpaste prevent cavities. - Grammarof or relating to a voice in grammar, a verb form, or construction in which the subject is usually the person or thing that performs or causes the action of the verb. In the verb form write in I write letters every day, the verb write is active(opposed to passive ).
- Geology(of a volcano) currently in eruption or likely to erupt.
- Military(of military personnel) currently on duty and prepared for military action.
n. [countable] - Grammarthe active voice, or a form in this voice: Put that verb into the active.
ac•tive•ly, adv. ac•tive•ness, n. [uncountable]See -act-. WordReference Random House Unabridged Dictionary of American English © 2024ac•tive (ak′tiv),USA pronunciation adj. - engaged in action;
characterized by energetic work, participation, etc.;
busy:an active life. - being in a state of existence, progress, or motion:active hostilities.
- involving physical effort and action:active sports.
- having the power of quick motion;
nimble:active as a gazelle. - characterized by action, motion, volume, use, participation, etc.:an active market in wheat; an active list of subscribers.
- causing activity or change;
capable of exerting influence (opposed to passive):active treason. - effective (opposed to inert):active ingredients.
- Grammarnoting or pertaining to a voice of verbal inflection in which typically the subject of the sentence is represented as performing the action expressed by the verb (opposed to passive):Writesin He writes a letter every day is an active verb form.
- requiring or giving rise to action;
practical:an active course. - Geology(of a volcano) in eruption.
- Business[Accountableing.]profitable;
busy:active accounts. - requiring personal effort or attention;
not automatic:an active alarm system. - Businessinterest-bearing:active paper.
- [Med.]acting quickly;
producing immediate effects:active remedies. - Sociology(of a crowd) engaging in purposeful activity, often of a militant nature. Cf. expressive (def. 4).
- Aerospaceable to transmit signals:an active communications satellite.
- Electronics(of a device or system) acting as a source of electrical energy, as a generator, or capable of amplifying or converting voltages or currents, as a transistor or diode.
- Energy(of a solar heating system) accumulating and distributing solar heat by mechanical means.
- Militaryserving on active duty.
n. - Grammar
- the active voice.
- a form or construction in the active voice.
- an active person, member, subscriber, etc.:The circular was mailed only to the actives on our list.
- Informal Termssomething showing considerable action or activity:On the stock market there was heavy trading in the actives.
- Latin
- Middle French
- Latin āctīvus (see act, -ive); replacing Middle English actif
- 1300–50
- 1.See corresponding entry in Unabridged acting; working; operative.
- 3.See corresponding entry in Unabridged Active, energetic, strenuous, vigorous imply a liveliness and briskness in accomplishing something. Active suggests quickness and diligence as opposed to laziness or dilatory methods:an active and useful person.Energetic suggests forceful and intense, sometimes nervous, activity:conducting an energetic campaign.Strenuous implies arduous and zealous activity with a sense of urgency:a strenuous effort.Vigorous suggests strong, effective activity:using vigorous measures to accomplish an end.
- 4.See corresponding entry in Unabridged agile, sprightly.
- 1.See corresponding entry in Unabridged lazy.
- 5.See corresponding entry in Unabridged sluggish.
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