effect
A2Pronunciation
UK
- /ɪfˈɛkt/
US
- /ˈifɛkt/
Meanings
Noun
a result, consequence, or change caused by something
a visual, sound, or dramatic technique used to create an impression for an audience
operative force or validity, especially of a law, rule, or agreement
More meaningsFewer meanings
personal belongings, especially when referred to collectively
Verb
to make something happen or bring it about
Beyond the definition
Think of dominoes falling: the first one causes the others to fall, and the falling is the effect. An effect is what happens because of something else. A good night's sleep has a positive effect on your mood, while bad weather can have a negative effect on travel plans. Sometimes, "effect" is used as a verb meaning "to bring about" or "to make happen"—for example, "She worked hard to effect change in her community." It is often confused with "affect," which is usually the action of influencing something.
The word "effect" can be a bit tricky because it plays multiple roles. Most commonly, it is a noun meaning a result or consequence of an action or cause. Imagine planting a seed: the seed is the cause, and the plant that grows is the effect. A side effect of medicine might be drowsiness, while the intended effect is to cure an illness.
But "effect" isn't just about what happens after something else; it can also describe influence or impact. For example, "The new law had a significant effect on small businesses." This means it changed things for those businesses in a noticeable way.
Interestingly, "effect" can also be used as a verb, though this is less common and more formal. As a verb, it means to bring something about or to accomplish a goal—like, "The politician hoped to effect real change through legislation." Think of it as actively making a specific result happen.
It's important not to confuse "effect" with its close cousin, "affect," which is usually a verb meaning to influence something. Remember this simple rule: Affect is the Action (the verb), and Effect is the End result (the noun).
So whether you are talking about consequences, influences, or actively making things happen, "effect" describes the outcome of a cause—the ripple that spreads from an initial action.
Examples
- 1
Policy impact
The new policy had little effect on office life.
- 2
Sleep
Stress can have a bad effect on your sleep.
- Patternhave an effect on + someone/something
influence them or it
- 3
Medicine
The medicine usually takes effect within half an hour.
- Phrasetake effect
start working
- 4
Medical result
One possible side effect is feeling tired.
More examplesFewer examples
- 5
Caused result
The higher tax had the effect of raising prices.
- Patternhave the effect of + -ing verb
cause that result
- 6
Official rules
The new safety rules go into effect next month.
- Phrasego into effect
officially start being used
- 7
Practical reality
In effect, we were paying twice for the same service.
- Phrasein effect
in reality or in practice
- 8
Film production
The film uses practical effects instead of a lot of computer graphics.
- 9
Formal verb
The company hopes to effect the change without cutting jobs.
- Usage
effect as a verb is formal and means cause something to happen
See also
Similar
Shades of meaning
Contrast
Do not confuse
Used with (collocations)
- have an effect
- take effect
- side effect
- cause and effect
Word family
Explore
- causation
- chain reaction
Forms and spellings
4 forms open this card.
Main spelling
- effectnounverb
Forms
- effectspluralnounverb
- effectedpast tenseverbnoun
- effecting-ing formverbnoun