Real Dictionary

sell
verb: If a shop sells a particular thing, it is available for people to buy there.
verb: If something sells for a particular price, that price is paid for it.
verb: If something sells, it is bought by the public, usually in fairly large quantities.
verb: If you sell someone an idea or proposal, or sell someone on an idea, you convince them that it is a good one.
verb: If you sell something that you own, you let someone have it in return for money.
verb: Something that sells a product makes people want to buy the product.

sell in American English
to give up, deliver, or exchange (property, goods, services, etc.) for money or its equivalent

sell in American English 1
intransitive verb: to engage in selling something
transitive verb: to transfer (goods) to or render (services) for another in exchange for money; dispose of to a purchaser for a price

sell in American English 2
self

sell in British English
verb: to dispose of or transfer or be disposed of or transferred to a purchaser in exchange for money or other consideration; put or be on sale