The meaning of FAIL is to lose strength : weaken. How to use fail in a sentence.

FAIL definition: to fall short of success or achievement in something expected, attempted, desired, or approved. See examples of fail used in a sentence.

FAIL meaning: 1. to not succeed in what you are trying to achieve or are expected to do: 2. if none of our plans…. Learn more.

1. A failing grade: The student received a fail on the final paper. 2. Informal Something that does not achieve the desired result; a failure: My first attempt to make flourless cookies was a big fail.

Definition of fail verb in Oxford Advanced Learner's Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more.

If a quality or ability that you have fails you, or if it fails, it is not good enough in a particular situation to enable you to do what you want to do. For once, the artist's fertile imagination failed him. [VERB …

He failed to act on the advice of his staff. [=he should have acted on their advice but he didn't] He failed to mention his new girlfriend when he spoke to his parents.

fail meaning, definition, what is fail: to not succeed in achieving something: Learn more.

to fall short of success or achievement in something expected, attempted, desired, or approved: The experiment failed because of poor planning. to receive less than the passing grade or mark in an …

Feb 4, 2026 · fail (third-person singular simple present fails, present participle failing, simple past and past participle failed) Throughout my life, I have always failed.