Merriam-Webster Collegiate Dictionary - buy

 I. verb  (bought; ~ing)  Etymology: Middle English byen, from Old English bycgan; akin to Gothic bugjan to ~  Date: before 12th century  transitive verb  1. to acquire possession, ownership, or rights to the use or services of by payment especially of money ; purchase  2.  a. to obtain in exchange for something often at a sacrifice they bought peace with their freedom  b. redeem 6  3. bribe, hire  4. to be the purchasing equivalent of the dollar ~s less today than it used to  5. accept, believe I don't ~ that hooey — often used with into  intransitive verb to make a purchase  • ~er noun  II. noun  Date: 1879  1. something of value at a favorable price; especially bargain it's a real ~ at that price  2. an act of ~ing ; purchase