stockstockstocks1noun1things that a shop keeps ready to sell: We have a large stock of tables and chairs.I'll see if we have your size in stock.I'm afraid that book's out of stock at the moment.2(business) a share in a company or business that somebody has bought, or the value of those shares: stocks and sharesLook at stock exchange.stockstockstocksstockedstocking2verb (stocks, stocking, stocked)to keep something ready to sell: I'm afraid we don't stock umbrellas.