English Reference
noun

breakdown

n.
US /ˈbɹeɪkˌdaʊn/ UK /bɹˈeɪkdaʊn/ break·down UK spelling breakdown's, breakdown's

  1. 01 B1 Intermediate

    a situation where a vehicle or machine stops working.

    a mechanical failure, typically involving a motor vehicle or industrial machinery, that prevents continued operation.

    Simple

    The heavy rain caused a breakdown of the heating system in the office.

    In context

    The frequent mechanical breakdowns of the aging fleet have led to significant delays in the city's public transport schedule.

  2. 02 B2 Upper Intermediate

    a list of all the separate parts of something, like a bill or a report.

    the division of a total into its constituent parts for the purpose of detailed analysis or explanation.

    Simple

    Can you give me a breakdown of the costs for the kitchen renovation?

    In context

    The financial report provides a comprehensive breakdown of expenditure across all regional departments for the final fiscal quarter.

  3. 03 B2 Upper Intermediate Medicine

    a period of mental illness that makes it impossible to live your life normally.

    a period of acute mental distress or psychological collapse that renders an individual unable to function in daily life.

    Simple

    He suffered a nervous breakdown after working too many hours for months.

    In context

    The intense pressure of the executive role eventually led to a complete physical and mental breakdown, requiring several months of clinical recovery.

  4. 04 B2 Upper Intermediate

    when a relationship, a talk, or a system stops working or fails.

    the collapse or failure of a relationship, process, or social structure.

    Simple

    The breakdown of communication between the two countries led to a trade war.

    In context

    Sociologists are studying the breakdown of traditional family structures in rapidly urbanizing environments.

  5. 05 C1 Advanced Technical Music

    a part of a song where the music changes, often becoming simpler or heavier.

    a section of a musical composition characterized by a reduction in instrumentation or a shift to a heavy, rhythmic focus.

    Simple

    The crowd started dancing wildly during the heavy breakdown in the middle of the song.

    In context

    The track features a sophisticated breakdown where the percussion takes center stage, stripping away the melodic layers to emphasize the rhythmic complexity.

  6. 06 C1 Advanced Technical Science

    the process of a substance rotting or breaking into smaller parts.

    the chemical or biological decomposition of a substance into its constituent elements.

    Simple

    Bacteria help with the breakdown of organic waste in the soil.

    In context

    The enzyme is responsible for the rapid breakdown of complex carbohydrates into simple sugars during the digestive process.

Scientists say climate breakdown is causing more frequent and more extreme weather events, evaporating soils and waterways, fuelling wildfires and leading to thousands of excess deaths in France.

The Guardian· 14 Aug 2026

Government figures also provide a regional breakdown of the number of prisoners released into homelessness.

The Guardian· 11 Aug 2026

Deverbal from break down.

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

This entry
Level C1 · Advanced
Frequency Common
Updated