failed Definition

fail
verb failed, failing

tr & intr
1. Not to succeed; to be unsuccessful in (an undertaking).

Thesaurus: miscarry, fall short, miss, lose, neglect, slip, abort, fall flat, go up in smoke; Antonym: succeed, win, triumph.
Form: fail in something (often)
2. To judge (a candidate) not good enough to pass a test, etc.
intr
3. Said of machinery, a bodily organ, etc: to stop working or functioning.
intr
4. Not to manage (to do something).

Example: failed to pay the bill in time
5. Not to bother (doing something).
6. To let (someone) down; to disappoint.
7. Said of courage, strength, etc: to desert (one) at the time of need.
intr
8. To become gradually weaker.

Thesaurus: decay, lessen, worsen, sink, decline, dwindle, fade, founder, weaken, wane, droop, peter out; Antonym: gain, improve.
intr
9. Said of a business, etc: to collapse; to become insolvent or bankrupt.

Thesaurus: default, go bankrupt, fold, go out of business, go under, go belly up (US slang), go down the tubes (slang); Antonym: prosper.

noun

1. A failure, especially in an exam.

Idiom: fail to see

To be unable to understand.

Idiom: without fail

For certain; with complete regularity and reliability.
Thesaurus: constantly, dependably, reliably, regularly.

Etymology: 13c: from Latin fallere to deceive or disappoint.