Organisation and organization mean the same thing. They are alternative spellings of the same word, both being used in British English and only one being used in American English.

An organization or organisation (Commonwealth English; see spelling differences) is an entity —such as a company, or corporation or an institution (formal organization), or an association —comprising one …

[countable] a group of people who form a business, club, etc. together in order to achieve a particular aim. She's the president of a large international organization. He works with local community …

The meaning of ORGANIZATION is the act or process of organizing or of being organized. How to use organization in a sentence.

An organization is a group of people who work together, like a neighborhood association, a charity, a union, or a corporation. You can use the word organization to refer to group or business, or to the act …

Meaning of organization in English organization noun (UK usually organisation) uk / ˌɔː.ɡ ə n.aɪˈzeɪ.ʃ ə n / us / ˌɔːr.ɡ ə n.əˈzeɪ.ʃ ə n /

An organization is an official group of people, for example a political party, a business, a charity, or a club. Most of these specialized schools are provided by voluntary organizations. ...a report by the …