countermand

nouns

a contrary command cancelling or reversing a previous command
countermand
is a type of (narrower)
an authoritative direction or instruction to do something
bid, bidding, command, dictation

verbs

cancel officially
"He revoked the ban on smoking"; "lift an embargo"; "vacate a death sentence"
annul, countermand, lift, overturn, repeal, rescind, reverse, revoke, vacate