effect

1 effect /ɪˈfɛkt/ noun
plural effects
1 effect
/ɪˈfɛkt/
noun
plural effects
Britannica Dictionary definition of EFFECT
1 
: a change that results when something is done or happens : an event, condition, or state of affairs that is produced by a cause
[count]
[noncount]
◊ If something has an effect on something or someone, it changes or influences that thing or person in some way.
— see also domino effect, greenhouse effect, ripple effect, side effect, snowball effect, placebo effect at placebo
2 
[count] : a particular feeling or mood created by something
◊ Something that is done for effect is done in a deliberate way to produce a particular feeling or reaction.
3 
[count] : an image or a sound that is created in television, radio, or movies to imitate something real : special effect — usually plural
4 
[noncount] : the state of something that is actually working or operating
◊ If a law or something like a law takes effect, comes into effect, or goes into effect, it begins to work or to be enforced.
◊ If a drug or something like a drug takes effect, it begins to produce the results it is meant to produce.
◊ To give effect to something or to carry/bring/put something into effect is to make it begin doing what it was intended to do.
5 
effects [plural] : personal property or possessions

in effect

— used to say that one thing has the same effect or result as something else

to good effect

◊ If you use something to good/great/fine/outstanding (etc.) effect, you use it in a way that produces good results.

to little/no effect

◊ If something is done to little effect or to no effect, it produces little or no change.

to that effect

or to the effect that
— used to indicate that the meaning of words is roughly correct even if the words themselves are not completely accurate
2 effect /ɪˈfɛkt/ verb
effects; effected; effecting
2 effect
/ɪˈfɛkt/
verb
effects; effected; effecting
Britannica Dictionary definition of EFFECT
[+ object] formal
1 
: to cause (something) : to make (something) happen
2 
: to cause (something) to produce the desired result
Usage see: affect