A2noun1K

Effect

UK /["/ɪˈfekt/"]/US /["/ɪˈfekt/"]/

Definition

a change that somebody/something causes in somebody/something else; a result

In simple words: A change that is caused by something.

Examples

The effect of the medicine was noticeable within hours.
The special effects in the movie were amazing.
She hoped to have a positive effect on her friend's mood.
The new law will take effect next month.
The loud noise had a surprising effect on the baby.
He used sound effects to enhance his presentation.
The teacher explained the effect of gravity on falling objects.

Usage notes

Use 'effect' to refer to results or changes. It's more formal than 'result.' Avoid using it where 'affect' (to influence) fits better.

Grammar pattern

effect + object

Memory hint

Think of 'effect' as an 'outcome' — both start with 'e' and relate to results.

Collocations

decisive
dramatic
far-reaching
bring about
exert
have
exist
occur
spread
in effect
to this effect
to that effect
cause and effect
to little effect
to no effect
special
cinematic
audio

Synonyms

belongings

Antonyms

cause
source

Common mistakes

Confused with 'affect' versus 'effect'.
Using 'effect' as a verb instead of a noun.
Confusing singular and plural forms (e.g., 'effects' vs 'effect').