English Reference
noun

cleanup

n.
US /ˈkɫiˌnəp/ UK /klˈiːnʌp/ cleanup UK spelling cleanups

  1. 01 B2 Upper Intermediate

    the act of cleaning a place or making it tidy after it has been used or made messy.

    the act or process of cleaning or tidying a specific area, often following an event or period of neglect.

    Simple

    The community organized a weekend cleanup of the local park to remove all the litter.

    In context

    After the festival concluded, the organizers faced a massive cleanup operation that required dozens of volunteers and several days of work.

    Usage

    Usually written as one word or hyphenated when used as a noun; the verb form is always two words.

    Pitfall
    I need to cleanup my room. I need to clean up my room.

    Use the two-word phrasal verb 'clean up' for the action; use the one-word 'cleanup' only as a noun.

    tidyingclearing
  2. 02 C1 Advanced Formal

    a large project to remove dangerous waste from the environment or to stop dishonest behavior in a group.

    an extensive operation to remove pollutants from the environment or to eliminate corruption and inefficiency within an organization.

    Simple

    The government promised a major cleanup of the river after the chemical spill.

    In context

    The new CEO initiated a thorough cleanup of the company's accounting practices to restore investor confidence.

    Teacher's tip

    This sense is frequently used in political and environmental contexts to describe systemic reform.

  3. 03 C2 Proficiency American EnglishTechnical Sport

    the fourth person to hit the ball in a baseball game, usually a very strong player.

    the fourth position in the batting order, typically reserved for a power hitter expected to 'clean' the bases by driving in runners.

    Simple

    He was nervous about batting cleanup in such an important game.

    In context

    The manager decided to move the star outfielder into the cleanup spot to maximize the team's scoring potential.

    Usage

    Often used as an attributive noun in the phrase 'cleanup hitter'.

    Teacher's tip

    This is a specialized term mostly used in North American baseball contexts.

    fourth hitter

Murakami recalled being put to work on cleanup duty.

Smithsonian Magazine· 5 Aug 2026

A deverbal from clean up.

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

This entry
Level B2 · Upper Intermediate
Frequency Frequent
Updated