1. İsim (bilgisini) tazeleme, yenileme, canlandırma.
    He gave his German a brushup before his trip to Bonn.
  2. İsim (ufak tefek kısımlarını) düzeltme, elden geçirme.
    He gave the collection a final brushup before putting it on display.
(bilgiyi) tazelemek, ilerletmek.
brush up one's English: İngilizce bilgisini tazelemek.
I must
brush up my French before going to Paris.