A list of errors together with the corrections for the errors, added as a separate page of a text prior to publication, or as a separate sheet inserted into a printed text; as, the errata was added after the printing was finished.. Note: Although originally a plural word, the use of errata as a singular word in second sense has become common.
... The author's Errata list was printed at the bottom of the page in a single block of small type, heavily smudged and not always legible. In at least one case, the requested change appears to be what the text already says. For these reasons, changes listed have ... — Anti-Achitophel (1682) - Three Verse Replies to Absalom and Achitophel by John Dryden • Elkanah Settle et al.