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.
effective (opposed to inert): active ingredients.
Grammar. noting 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): Writes in He writes a letter every day is an active verb form.
requiring or giving rise to action; practical: an active course.
requiring personal effort or attention; not automatic: an active alarm system.
interest-bearing: active paper.
Medicine/Medical. acting quickly; producing immediate effects: active remedies.
Sociology. (of a crowd) engaging in purposeful activity, often of a militant nature.: Compare expressive (def. 4).
Aerospace. able 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.
(of a solar heating system) accumulating and distributing solar heat by mechanical means.
Military. serving on active duty.
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. something showing considerable action or activity: On the stock market there was heavy trading in the actives.
- ac·tive·ly, adverb
- ac·tive·ness, noun
- non·ac·tive, adjective, noun
- pre·ac·tive, adjective
- pre·ac·tive·ness, noun
- qua·si-ac·tive, adjective
- sem·i·ac·tive, adjective
- sem·i·ac·tive·ness, noun
- su·per·ac·tive, adjective
- su·per·ac·tive·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use active in a sentence
En même temps elle prend des mesures actives, et si ces mesures sont tolérées, ses prétentions augmenteront proportionnellement.Why We Are At War (2nd Edition, revised) | Members of the Oxford Faculty of Modern History
All the leading junior clubs swore by him and would use no ball but his,—the champion Actives, the Alerts, the Uncas.From School to Battle-field | Charles King
Liquors which can be made solid by the effect of certain re-actives, offer, on this account, some advantage.History of Embalming | J. N. Gannal
British Dictionary definitions for active
in a state of action; moving, working, or doing something
busy or involved: an active life
exerting influence; effective: an active ingredient
being fully engaged in military service (esp in the phrase on active service)
astronomy (of the sun) exhibiting a large number of sunspots, solar flares, etc, and a marked variation in intensity and frequency of radio emission: Compare quiet (def. 8)
producing or being used to produce profit, esp in the form of interest: active balances
of or denoting stocks or shares that have been actively bought and sold as recorded in the Official List of the London Stock Exchange
containing a source of power: an active network
capable of amplifying a signal or controlling some function: an active component; an active communication satellite
the active voice
an active verb
mainly US a member of an organization who participates in its activities
- actively, adverb
- activeness, noun
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012