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Definition
A keyword: an important word to learn fail1   Show phonetics
verb
1 NOT SUCCEED [I] to not be successful
Dad's business failed after just three years.
She keeps failing in her attempt to lose weight.

2 fail to do sth to not do what is necessary or expected
John failed to turn up for football practice yesterday.

3 EXAM [I,T] to not pass a test or an exam, or to decide that someone has not passed
I'm worried about failing my driving test.

4 STOP WORKING [I] to stop working normally, or to become weaker
Two of the plane's engines had failed.
My eyesight's beginning to fail.

5 NOT HELPING [T] to stop being helpful or useful to someone when they need you
The government is failing the poor and unemployed.

6 I fail to see/understand used to show that you do not accept something
[+ question word] I fail to see why you cannot work on a Sunday.

The first and last word in dictionaries