- effect
- 1
/I'fekt/ noun
1 CHANGE/RESULT (C, U) the way in which an event, action, or person changes someone or something(+ of): the harmful effects of smoking | have an effect on: Inflation is having a disastrous effect on the economy. | have/achieve the desired effect (=produce the result you wanted): The plan failed to achieve the desired effect of diverting traffic from the city. | cause and effect (=something that happens, and the other things that happen as a result of this) —see affect2 put/bring sth into effect to make a plan or idea happen: It won't be easy to put the changes into effect.3 come into effect/take effect if a new law, rule, or system comes into effect, it officially starts: The new tax rates come into effect from April.4 take effect to start to produce results: The morphine was starting to take effect and the pain eased.5 in effect used when you are describing what the real situation is, especially when it is different from the way that it seems to be: In effect, our wages will fall by 2%.6 to good/little effect if you do something to good effect, it is successful and does what you want it to: Pat rubbed the stain frantically with a cloth, but to little effect.7 to this/that effect used when you are giving the general meaning of what someone says, rather than the exact words: I thought he was wrong and said something to that effect at dinner. | words to that effect: Jim said he was unhappy at work, or words to that effect. | to the effect that: Karl's memo was to the effect that we all needed to think more about marketing possibilities.8 with immediate effect/with effect from starting to happen immediately, or from a particular date: Hoskins is appointed manager, with immediate effect.9 IDEA/FEELING (countable usually singular) an idea or feeling that an artist, speaker, book etc tries to make you think of or feel: Turner's paintings give an effect of light. | do sth for effect (=do something deliberately to shock or surprise people)10 PERSONAL THINGS effects (plural) formal the things that someone owns; belongings: Don's few personal effects were in a suitcase under the bed.11 FILM effects (plural) unusual or impressive sounds or images that are artificially produced for a film, play, or radio programme—see also: sound effects, special effect 2 verb (T) formal to make something happen: efforts to effect a reconciliation between the warring factions
Longman dictionary of contemporary English. 2004.