A process that allows credits awarded by one higher education awarding body to be recognised and count towards the requirements of a programme at another institution; or that allows credit gained on a particular programme to contribute towards the requirements of a different one.
Source: European Union (2018) ECTS Users’ Guide
https://ec.europa.eu/education/sites/education/files/document-library-docs/ects-users-guide_en.pdf
https://ec.europa.eu/education/sites/education/files/document-library-docs/ects-users-guide_en.pdf