course correction; trajectory change; orbital adjustment
unaltered; unedited; unamended; uncensored; unexpurgated
upward adjustment; upward revision
downward adjustment; downward revision
correction fluid; correcting fluid; white-out; Wite-Out; Tipp-Ex; Liquid Paper
(software) patch; updater (to correct a program flaw)
(filing) revised (income tax) return
modification time (of a file, e.g.)
rectification; modification
modified Newtonian dynamics; MOND