effect ( effects plural & 3rd person present) ( effecting present participle) ( effected past tense & past participle )
1 n-var The effectof one thing on another is the change that the first thing causes in the second thing.
oft N of/on n, N of -ing, adj N
Parents worry about the effect of music on their adolescent's behavior..., Even minor head injuries can cause long-lasting psychological effects.
2 n-count An effect is an impression that someone creates deliberately, for example in a place or in a piece of writing.
The whole effect is cool, light and airy.
3 n-plural A person's effects are the things that they have with them at a particular time, for example when they are arrested or admitted to hospital, or the things that they owned when they died.
FORMAL with poss
His daughters were collecting his effects.
4 n-plural The effects in a film are the specially created sounds and scenery.
5 verb If you effect something that you are trying to achieve, you succeed in causing it to happen.
FORMAL Prospects for effecting real political change seemed to have taken a major step backwards. V n
7 If you say that someone is doing something for effect, you mean that they are doing it in order to impress people and to draw attention to themselves.
for effect phrase PHR after v
The Cockney accent was put on for effect.
8 You add in effect to a statement or opinion that is not precisely accurate, but which you feel is a reasonable description or summary of a particular situation.
in effect phrase PHR with cl (vagueness)
That deal would create, in effect, the world's biggest airline.
9 If you put, bring, or carry a plan or idea into effect, you cause it to happen in practice.
(put/bring/carry) sthg into effect phrase V inflects
These and other such measures ought to have been put into effect in 1985.
10 If a law or policy takes effect or comes into effect at a particular time, it officially begins to apply or be valid from that time. If it remains in effect, it still applies or is still valid.
take/come into effect phrase V inflects
...the ban on new logging permits which will take effect from July..., The decision was taken yesterday and will remain in effect until further government instructions.
11 You can say that something takes effect when it starts to produce the results that are intended.
take effect phrase V inflects
The second injection should only have been given once the first drug had taken effect...
12 You use effect in expressions such as to good effect and to no effect in order to indicate how successful or impressive an action is.
to (good) effect phrase PHR after v
Mr Morris feels the museum is using advertising to good effect...
13 You use to this effect, to that effect, or to the effect that to indicate that you have given or are giving a summary of something that was said or written, and not the actual words used.
to this/that effect phrase n PHR
A circular to this effect will be issued in the next few weeks...
14 If you say that something will happen with immediate effect or with effectfrom a particular time, you mean that it will begin to apply or be valid immediately or from the stated time.
with (immediate) effect/effect from phrase PHR after v
The price of the Saturday edition is going up with effect from 3 November.
cause and effect