Correctness is freedom from error. Grammatical correctness, the correctness of the answer, political correctness.
Political correctness is now the commonest use by a long way, and it has been an insult almost since it appeared, having been used seriously for only a very short time. Elsewhere it simply means being right.
1nouncorrectnessFreedom from error.
“Please check the correctness of your bank details before you send the form.”
correctness is a quality.
Also accepted in games: accuracy
Proto-Indo-European
*h₃reǵ-
Latin
correctus — improved, amended, correct
French
correct
English
correct
English, today
correctness
Built from
From correct + -ness. correct Borrowed from French correct, from Latin correctus (“improved, amended, correct”), past participle of corrigere, conrigere (“to make straight, make right, make better, improve, correct”), from con- (“together”) + combining form of rego (“I rule, make straight”).
Etymology from Wiktionary, CC BY-SA