Definitions of buy:

• noun:   an advantageous purchase

  Example: "The stock was a real buy at that price"

• verb:   obtain by purchase; acquire by means of a financial transaction

  Example: "She buys for the big department store"

• verb:   acquire by trade or sacrifice or exchange

  Example: "She wanted to buy his love with her dedication to him and his work"

• verb:   be worth or be capable of buying

  Example: "This sum will buy you a ride on the train"

• verb:   accept as true

  Example: "I can't buy this story"

• verb:   make illegal payments to in exchange for favors or influence