Sell/sel/ Definition 1 of 5Pro Tip 1/3Transactional Nature Understand that 'sell' involves a buyer giving money in return for goods or services. He sells vintage comics at the market. Pro Tip 2/3Expressing Quantity 'Sell' can imply the amount of something sold, often used with words like 'out' or 'well'. Her lemonade stand sells out quickly. Pro Tip 3/3Fixed Expressions Learn set phrases with 'sell', like 'sell like hotcakes', meaning something sells very fast. Her new book is selling like hotcakes.