A Revision

1. (uncountable) The process of revising:
   1. The action or process of reviewing, editing and amending.
   2. (Britain, Australia, New Zealand)The action or process of reviewing something previously learned, especially one′s notes in preparation for a test or examination.
2. (countable) A changed edition, or new version; a modification.
3. (countable) A story corrected or expanded by a writer commissioned by the original author.

Synonyms

• (UK, Australia, New Zealand: reviewing something previously learned): review (US)