noun

• The act of correcting.
• A substitution for an error or mistake.
• (chiefly in the plural) Punishment that is intended to rehabilitate an offender.
• An amount or quantity of something added or subtracted so as to correct.
• A decline in a stock market price after a large rise.
• (procedure word, military) a station's indication that previous information was incorrect and will continue with correct information from the last correct transmitted