Meaning of “refresher” in the English Dictionary

british dictionary

"refresher" in British English

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refreshernoun [ C ]

uk /rɪˈfreʃ.ər/ us /rɪˈfreʃ.ɚ/

a course to practise and improve skills, especially because you have not used them for a long time:

I went on a refresher course on new techniques in design to bring myself up to date.

(Definition of “refresher” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)