To improve, renew, renovate, or revise (something).
An act of improving, renewing, renovating, or revising something; an improvement, renovation, revamping, or revision.
To review, alter and amend, especially of written material.
To look over again (something previously written or learned), especially in preparation for an examination.
A second proof sheet; a proof sheet taken after the first or a subsequent correction.
A review or a revision.