mistake

1 mistake /məˈsteɪk/ noun
plural mistakes
1 mistake
/məˈsteɪk/
noun
plural mistakes
Britannica Dictionary definition of MISTAKE
[count]
: something that is not correct : a wrong action, statement, or judgment : error
— often used with make
— see also make no mistake (below)

and no mistake

chiefly British, old-fashioned
— used to stress the truth or accuracy of a statement

by mistake

: because of a mistake : without intending to

make no mistake

— used to stress the truth or accuracy of a statement
2 mistake /məˈsteɪk/ verb
mistakes; mistook /məˈstʊk/ ; mistaken /məˈsteɪkən/ ; mistaking
2 mistake
/məˈsteɪk/
verb
mistakes; mistook /məˈstʊk/ ; mistaken /məˈsteɪkən/ ; mistaking
Britannica Dictionary definition of MISTAKE
[+ object]
1 
: to understand (something or someone) incorrectly
2 
: to make a wrong judgment about (something)
◊ If you say there is no mistaking something, it is very clear or obvious.
3 
: to identify (someone or something) incorrectly — usually + for