negation
change or action with an opposite effect to a previous action
parity
flip in the sign of one spatial coordinate, in classical and quantum physics
logical negation
operation that takes a proposition p to another proposition "not p", written ¬p, which is interpreted intuitively as being true when p is false, and false when p is true; unary (single-argument) logical connective
disqualification
any form of rejection of something that was previously accepted
return
putting, sending, or directing an item or material back to where it came from
repeal
removal or reversal of a law
reversal
change to the opposite spatial or temporal direction
colostomy reversal
Colon reattachment procedure
Not!
grammatical construction in the English language
reversion
in software development and content editing, abandonment of recent changes in favor of a return to a previous version
exoneration
reversal of a criminal conviction through demonstration of innocence, a flaw in the conviction, or otherwise
rectification
correction of a mistake
product return
return of a purchased product in exchange for refund or compensation
retracement
complete or partial reversal of the price of a security or a derivative from its current trend
vacated judgment
voiding a previous legal judgment