0 a training course that keeps people informed about new developments in their area of interest or skill --
1 a course to practise and improve skills, especially because you have not used them for a long time: --
a refresher course in/on sth The incident prompted officials to put managers through a refresher course in customer service.
do/receive/take a refresher course
NYA ORD
European
May 10, 2021
DAGENS ORD
Shimmer
refresher course