Definition of "buy"

(transitive, ditransitive) To obtain (something) in exchange for money or goods.  quotations  examples

(transitive, ditransitive) To obtain, especially by some sacrifice.  quotations  examples

(transitive, archaic) To suffer consequences for (something) through being deprived of something; to pay for (something one has done).  quotations

(transitive) To bribe.  examples

(transitive) To be equivalent to in value.  examples

(transitive, informal) to accept as true; to believe  quotations  examples

(intransitive) To make a purchase or purchases, to treat (for a drink, meal or gift)  examples

(poker slang, transitive) To make a bluff, usually a large one.

Something which is bought; a purchase.  examples