English Reference
noun

failure

n.
US /ˈfeɪɫjɝ/ UK /fˈeɪliə/ fail·ure UK spelling failure's, failure's

  1. 01 B1 Intermediate

    a situation where you do not reach a goal or get the result you wanted.

    the state or condition of not meeting a desirable or intended objective; the opposite of success.

    Simple

    The project ended in failure because the team did not have enough time.

    In context

    The company's latest product was a commercial failure, largely due to poor timing and a lack of market research.

  2. 02 B2 Upper Intermediate

    someone or something that is not successful.

    an entity, person, or endeavour that has failed or is perceived as incapable of achieving success.

    Simple

    He felt like a failure after he didn't get into the university he wanted.

    In context

    The critics dismissed the play as a total failure, though the lead actor's performance was widely praised.

  3. 03 B2 Upper Intermediate

    when a machine, a system, or a part of the body stops working correctly.

    the termination of the ability of an item or organ to perform its required function.

    Simple

    The car stopped on the highway due to an engine failure.

    In context

    The patient was rushed to the hospital suffering from acute heart failure after the marathon.

  4. 04 C1 Advanced Formal Law

    not doing something that you were expected or supposed to do.

    the omission of an expected or required action, particularly a legal or professional obligation.

    Simple

    His failure to pay the bill on time resulted in a late fee.

    In context

    The board's failure to disclose the financial risks led to a series of lawsuits from angry shareholders.

    Usage

    Often followed by an infinitive, as in 'failure to comply'.

Usage failure to comply · cause failure · explain failure

The agency has not yet determined the root cause of the failure.

Al Jazeera· 14 Aug 2026

For some, these episodes point to clear security failures on the part of AI companies leading the charge on this game-changing, era-defining tech.

BBC News· 6 Aug 2026

From Anglo-Norman failer, from Old French faillir (“to fail”). Equivalent to fail + -ure.

Etymology adapted from Wiktionary, available under CC BY-SA 4.0.

This entry
Origin Old French faillir
Level B2 · Upper Intermediate
Frequency Common
Updated