› [C, U] a change, reaction, or result that is caused by something: The accident had a huge effect on her life. We don't know the long-term effects of this drug.
in effect › used to say what the real situation is: This means, in effect, that the plan has been scrapped.
come/go into effect › to start being used: New food safety rules come into effect on Monday.
take effect › to start to produce results or changes: The anaesthetic takes effect in about ten minutes.
to that effect › used to say that you are giving the general meaning of something but not the exact words: He said he was bored with school or something to that effect.
a sound/special/visual, etc effect › a sound, image, etc that is created artificially → See also side effect