crash course
/ˈkræʃ ˌkɔrs/, /ˌkoʊrs/ n [C]Definition
› a short period of instruction in which much is learned about a subject › A crash course is also an experience that is difficult or unexpected but provides new and useful information: To prepare for his role in the movie, he took a crash course in doing farm chores like plowing fields and shearing sheep.
(Definition of crash course n from the Cambridge Academic Content Dictionary
© Cambridge University Press)
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