revision

Universal Words noun 1 [C] a change or set of changes to sth: He made some minor revisions to the report before printing it out. 2 [U,C] the act of changing sth, or of examining sth with the intention of changing it: a system in need of revision * a revision of trading standards * Their educational policies are due for revision. 3 [U] (BrE) the process of learning work for an exam: Have you started your revision yet? * a revision class / course / timetable