mistake /mɪˈsteɪk/ noun [C]
› something that you do or think which is wrong
hata, yanlış, kusur a spelling mistake He made a lot of mistakes in his written test. [+ to do sth] It would be a big mistake to leave school. [+ of + doing sth] She made the mistake of giving him her phone number.1902
by mistake › If you do something by mistake, you do it without intending to.
kazara, yanlışlıkla, kasıtsız I picked up someone else's book by mistake.1902