Organisation vs. Organization | Definition & Examples

Organisation and organization are different spellings of the noun referring to a systematic arrangement, a business or association, or the act of organizing. The word is closely related to the verb “organize/organise.”

The spelling varies depending on whether you’re using UK or US English:

  • In US English, “organization” is the only accepted spelling.
  • In UK English, “organisation” is standard (though “organization” is still acceptable).
    Examples: Organization and organisation in a sentence
    The library shelves displayed no obvious sign of organization/organisation.

    Oran is the spokesperson for a national labor organization/organisation.

    The festival was canceled due to poor organization/organisation.

    Many words that are spelled with a “z” in US English are spelled with an “s” in US English. Some other common examples include “analyze/analyse,” “realize/realise,” “recognize/recognise,” and “apologize/apologise.”

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    Other forms of the word

    The same spelling distinction carries over to related words, such as “organized/organised,” “organizing/organising,” and “organizer/organiser.”

    • In US English, “organized,” “organizing,” and “organizer” are correct.
    • In UK English, “organised,” “organising,” and “organiser” are standard.
            Examples: Other words related to organization and organisation
            I recently donated some old clothes and organized/organised my closet.

            Tanya and Joey are organizing/organising a fundraiser on behalf of a local charity.

            Aaron works as a freelance event organizer/organiser.

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            Eoghan Ryan

            Eoghan has a lot of experience with theses and dissertations at bachelor's, MA, and PhD level. He has taught university English courses, helping students to improve their research and writing.