A more thorough explanation:

Sell

To sell means to transfer property from a seller to a buyer via a sale.

For example, if you sell your old car to your friend, you transfer ownership of the car to your friend in exchange for money.

Another example is when a store sells a product to a customer. The store transfers ownership of the product to the customer in exchange for payment.

These examples illustrate the definition of selling because in both cases, property (the car and the product) is transferred from the seller to the buyer through a sale. The seller receives payment in exchange for giving up ownership of the property.