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[ US /ˈifɛktɪv, ɪˈfɛktɪv/ ]
[ UK /ɪfˈɛktɪv/ ]
ADJECTIVE
  1. ready for service
    the fort was held by about 100 effective soldiers
  2. works well as a means or remedy
    an effective reprimand
    a lotion that is effective in cases of prickly heat
  3. able to accomplish a purpose; functioning effectively
    effective personnel
    the efficient cause of the revolution
    an efficient secretary
    people who will do nothing unless they get something out of it for themselves are often highly effective persons...
  4. producing or capable of producing an intended result or having a striking effect
    effective teaching methods
    an efficacious law
    an air-cooled motor was more effective than a witch's broomstick for rapid long-distance transportation
    his complaint proved to be effectual in bringing action
    effective steps toward peace
    made an effective entrance
  5. existing in fact; not theoretical; real
    confused increased equipment and expenditure with the quantity of effective work done
    a decline in the effective demand
  6. exerting force or influence
    the law is already in effect (or in force)
    a warranty good for two years
    the law is effective immediately

How To Use effective In A Sentence

  • Particulates and dust in Earth's atmosphere along the line of sight tend to absorb blue light more effectively than red light.
  • Swiss counter-intelligence was very effective, too, and 387 spies, mostly Swiss but including 100 Germans, were captured and brought to trial of whom 17 were executed.
  • The pump is capable of producing 1400 litres per hour at 16 rpm from a depth of 40 metres and is effective up to a depth of 100 metres. Archive for » 2005 » September : Sustainablog
  • This can entail harming companies that would be as efficient and as effective as Google is in these areas but for their limited access to consumers, creating a clear violation of Section 2 of the Sherman Act, of American law on monopolization, and on European competition law. Eric K. Clemons: One Click Away? Maybe and Maybe Not
  • ‘Sewing a squash ball into the back of their pyjamas or nightie might sound like a wind-up but it's effective because it stops people from sleeping on their back,’ he said.
  • On the ranges of Fort Devens, the troops were put through their paces on US weapons, from the stock-in-trade M16 assault rifle to the frighteningly-effective M249 SAW light machine gun.
  • Make sure that the construction proposal is reliable, the working procedure works canonically, and the construction monitor goes effectively.
  • Thus, developing a vaccine directed against one or a few capsular polysaccharides may not be widely effective.
  • He's an effective enough politician but somehow he lacks the statesmanlike gravitas of a world leader.
  • What is difficult to overlook is her record of being totally ineffective as a four-term assemblywomen, her inability or unwillingness to work with others, even within her own party, and her extreme positions on issues such as Medicare, social security, education, veterans affairs and many others. Mitchell Bard: The Tea Party All-Stars: The Worst of Extreme GOP Midterm Candidates
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