This is the 12801st most frequent Russian word.
крупный
Large; big.
Here, 'крупный' means 'large' or 'big', referring to the size or scale of the company.
Он работает в крупной компании.
He works in a large company.
In this example, 'крупный' describes the size of the potatoes, indicating that they are physically large.
На рынке можно купить крупный картофель.
At the market, you can buy large potatoes.
Here, 'крупный' is used metaphorically to signify the significance or scale of the mistake, meaning 'major' or 'significant'.