buybuy1 /baɪ/ verb (past tensepst and past participlepp bought /bɔːtbɒːt/) [transitiveT]1COMMERCEto get something by paying money for itWe just cannot afford to buy a new car.
buy somebody somethingCome on, I’ll buy you lunch.
2if a sum of money buys something, you can get it for that amount of money£400,000 should buy a decent four-bedroomed house, especially outside the London area.
buy somebody somethingA dollar won’t even buy you a cup of coffee these days.
3buy a pig in a poke informal to buy something without seeing it or looking at it carefully, that turns out to be bad valueHouse purchasers must satisfy themselves through legal advisers or surveyors that they are not buying a pig in a poke.
4buy a pupFINANCE informal to be cheated into buying something that is not good valueIf he has bought a pup, it is highly unlikely that any other shrewd financier would buy it from him.