n. 25B6; noun MISTAKE, inaccuracy, miscalculation, blunder, oversight; fallacy, misconception, delusion; misprint, erratum; informal slip-up, bloomer, boo-boo; Brit. informal boob.
25A0; in error WRONGLY, by mistake, mistakenly, incorrectly; accidentally, by accident, inadvertently, unintentionally, by chance.