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Merriam-Webster's Collegiate Dictionary ac·tive ETYMOLOGY Middle English, from Anglo-French or Latin; Anglo-French actif, from Latin activus, from actus, past participle of agereto drive, do — more at agent DATE 14th century 1. characterized by action rather than by contemplation or speculation an active life 2. producing or involving action or movement 3. a. of a verb form or voice : asserting that the person or thing represented by the grammatical subject performs the action represented by the verb hits in “he hits the ball” is active b. expressing action as distinct from mere existence or state 4. quick in physical movement : lively 5. marked by vigorous activity : busy the stock market was active 6. requiring vigorous action or exertion active sports 7. having practical operation or results : effective an active law 8. a. disposed to action : energetic took an active interest b. engaged in an action or activity an active club member c. of a volcano : currently erupting or likely to erupt — compare dormant 2a, extinct 1b d. characterized by emission of large amounts of electromagnetic energy an active galactic nucleus 9. engaged in full-time service especially in the armed forces active duty 10. marked by present operation, transaction, movement, or use an active account 11. a. capable of acting or reacting : reacting readily active nitrogen active ingredients b. tending to progress or to cause degeneration active tuberculosis c. of an electronic circuit element : capable of controlling voltages or currents d. (1) requiring the expenditure of energy active calcium ion uptake (2) functioning by the emission of radiant energy or sound radar is an active sensor 12. still eligible to win the pot in poker 13. moving down the line : visiting in the set — used of couples in contredanses or square dances • active noun • ac·tive·ly adverb • ac·tive·ness noun English Etymology active mid-14c., from L. activus, from actus (see act). Active voice is recorded from 1765 (grammatical use of active dates from 1520s). Related: Activate (v. 1620s). Oxford Advanced Learner's Dictionary-牛津双解-OALD7 ☞ active ac·tive / 5Aktiv / adjectiveBUSY 忙碌 1. always busy doing things, especially physical activities (尤指体力上)忙碌的,活跃的: Although he's nearly 80, he is still very active. 尽管快 80 岁了,他还是十分活跃。 OPP inactive TAKING PART 参加 2. involved in sth; making a determined effort and not leaving sth to happen by itself 积极的: They were both politically active. 他们两人在政治上都很积极。 active involvement / participation / support / resistance 积极参与/参加/支持/抵抗 She takes an active part in school life. 她积极参加学校活动。 The parents were active in campaigning against cuts to the education budget. 学生家长积极参加反对削减教育预算的活动。 They took active steps to prevent the spread of the disease. 他们采取积极措施,防止疾病蔓延。 DOING AN ACTIVITY 活动 3. doing sth regularly; functioning 定期进行的；起作用的: sexually active teenagers 性欲旺盛的青少年 animals that are active only at night 仅在夜间活动的动物 The virus is still active in the blood. 这种病毒仍然在血液中起作用。 an active volcano (= likely to erupt ) 活火山 OPP inactive ⇨ compare dormant LIVELY 充满活力 4. lively and full of ideas 活跃的；(思想上)充满活力的: That child has a very active imagination. 那个小孩想像力十分丰富。 CHEMICAL 化学 5. having or causing a chemical effect 起化学作用的；有效的: What is the active ingredient in aspirin? 什么是阿司匹林中的有效成分？ OPP inactive GRAMMAR 语法 6. connected with a verb whose subject is the person or thing that performs the action 主动语态的: In 'He was driving the car', the verb is active. 在 He was driving the car 一句中,动词是主动语态。 ⇨ compare passive • ac·tive·ly adv.: Your proposal is being actively considered. 你的提议正得到认真考虑。 She was actively looking for a job. 她在积极找工作。 noun (also 'active voice) [sing.] the form of a verb in which the subject is the person or thing that performs the action 主动语态 ⇨ compare passive Oxford Collocations Dictionary for Students of English active adj. VERBS be | become | keep (informal), remain Try to keep active in the cold weather. ADV. extremely, highly, very a highly active volcano | increasingly | fairly, quite, reasonably | equally a businessman who is equally active in politics | mentally, physically It's important to remain mentally active after retirement. | sexually A minority of children are sexually active before they are in their teens. | economically, politically When did you first become politically active? PREP. against drugs that are active against cancers | in She has been active in local politics for some years. OLT active adj. ⇨ active (the active ingredient in aspirin)⇨ busy 1 (active in politics)⇨ energetic (physically active) Webster's Third New International Dictionary, Unabridged Search result show the entry is found in: optically active , or active amyl alcohol , or active bond , or active carbon , or active component , or active door , or active duty , or active immunity , or active list , or active mass , or active serum , or active trust , or self-active , or surface-active , or surface-active agent , or active site , or active transport , or active intellect , or active reason , or active service , or cation-active , or anion-active ac·tive I. \ˈaktiv, -ēv also -əv\ adjective Etymology: Middle English, from Middle French or Latin; Middle French actif, from Latin activus, from actus (past participle of agere to act) + -ivus -ive — more at agent 1. : characterized by action rather than by contemplation or speculation < an active man > 2. : productive of action or movement < a dog very much awake and filled with active antagonism — Jack McLaren > 3. a. of a verb form or voice : asserting that the person or thing represented by the grammatical subject performs the action represented by the verb < hits in “he hits the ball” and shone in “the sun shone” are active> — contrasted with middle and passive b. : expressing action as distinct from mere existence or state < “he walks” and “he walked” have active verbs > — now used especially in the grammar of certain American Indian and African languages; compare neuter 1b, static , stative c. of a grammatical construction : containing an active verb form 4. : quick in physical movement : of agile and vigorous habit : nimble , lively < an animal active in burrowing > 5. : requiring vigorous action or exertion < an interest in active sports > 6. a. : having practical operation or results : effective < an active law > b. of a volcano : erupting at the present time or at intervals of a few years or having a crater that contains fluid lava — compare dormant , extinct 7. a. : disposed to action : energetic , diligent < to take an active interest > b. : engaged in an action or activity : participating < an active club member > 8. : engaged in full-time service especially in the armed forces < ordered to active duty > 9. : marked by present operation, transaction, movement, or use < an active coal mine > < an active bank account > < active titles in a publisher's catalog > < a student's active vocabulary > 10. a. : capable of acting or reacting especially in some specific manner or with more than ordinary vigor : reactive , activated < active nitrogen > < active charcoal > b. : optically active c. : radioactive < an active deposit > 11. : still eligible to win the pot in poker — used of a player who has not dropped 12. : moving down the line or visiting in the set — used of couples in contredanses or square dances 13. of a disease : progressing or retrogressing < active tuberculosis > • ac·tive·ly \-tə̇vlē, -li\ adverb • ac·tive·ness \-ivnə̇s, -ēv- also -əv-\ noun -es II. noun (-s) 1. : one that is active < fraternity alumni and actives > 2. a. : an active verb b. : the active voice of a language or a form in it III. adjective 1. : requiring the expenditure of energy < active calcium ion uptake > 2. : of or relating to the collection, storage, and redistribution of the sun's heat especially with the aid of pumps and blowers < an active solar energy system > 3. : functioning by the emission of radiant energy or sound < an active sensor > < active sonar > 4. : characterized by emission of large amounts of electromagnetic energy < an active galactic nucleus > |
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