1 real estate site REALTOR® agents recommend* Buy Rent Sell Pre-approval Just sold Home value 1. Something bought or for sale; a purchase. 2. An act of purchasing: a drug buy. 3. Something that is underpriced; a bargain. Official website for Costsco Wholesale. Shop by departments, or search for specific item(s). The meaning of BUY is to acquire possession, ownership, or rights to the use or services of by payment especially of money : purchase. How to use buy in a sentence. Shop at Best Buy for computers and tablets. Find laptops, desktops, all-in-one computers, monitors, tablets and more. Use the Best Buy store locator to find stores in your area. Then, visit each Best Buy store's page to see store hours, directions, news, events and more. Buy or sell new and used items easily on Facebook Marketplace, locally or from businesses. Find great deals on new items shipped from stores to your door. BUY definition: 1. to get something by paying money for it: 2. to pay someone so that they do what you want or do…. Learn more. Marketplace: Buy and sell locally with ease. List items fast, chat with buyers, and find great deals using our location-based mobile app today. BUY definition: to acquire the possession of, or the right to, by paying or promising to pay an equivalent, especially in money; purchase. See examples of buy used in a sentence.