0 to take a particular amount away from a price: --
1 to take a particular amount away from a price, value, etc.: --
Living next door to an empty home can also knock 10% off the value of your own property, say experts.
Customers can knock hundreds of dollars off their energy bills by following three simple steps.
The supermarket joined the fuel price war yesterday by knocking 5 cents a liter off its petrol and diesel prices.
We can complete it step by step however long the road is and it can't be completed however short the road is if you don't even mark your footprint.
We kunnen het stap voor stap voltooien, hoe lang de weg ook is en het kan niet worden voltooid, hoe kort de weg ook is, als je niet eens je voetafdruk markeert.