Mark : I think it's important to make a low profile when you are very rich.
Susan : Mark, you used the wrong word; the correct one is "keep". We say "to keep a low profile", not "to make a low profile"
Susan said "the wrong word" because it's known which word was wrongly used. The "the" refers to the word "make". If she'd said "a wrong word", it'd mean it was not known which word was used wrongly and her sentence would be meaningless.
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You have posted this thread in the wrong forum section.
The is used because it's generally known which forum section the topic was posted in. The "the" refers to the forum section the misplaced topic is currently in. ( the forum section is obviously not where the topic should be, hence it's the wrong forum section)
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>Natomiast np. w opowiadaniu powiedzielibsym
>
>he turned into a wrong street first and so was 10 minutes' late.
And this is where you put me on the spot. Following the logic used in the previous examples, I'd say "the wrong street".