WordWeb Online

1. Practice intended to polish performance or refresh the memory
   - review

1. Refresh one's memory
   - review, refresh, revise [Brit]
    
2. Bring to a highly developed, finished, or refined state
   "brush up your social manners";
   - polish, round, round off, polish up

Derived forms: brushes up, brushed up, brushups, brushing up

Type of: call back, call up, drill, exercise, hone, perfect, practice, practice session, recall, recitation, recollect, remember, retrieve, think