Definition: The word "sell" is primarily a verb that means to exchange something for money or to persuade someone to buy something. It can also mean to give up something for a price or to promote an idea.
Verb: "I want to sell my old bicycle."
Noun: "Getting people to buy the new phone was a hard sell."
Persuasion: "The marketing team had to sell the idea to the investors."
Betrayal: "He sold out his friends for a profit."
"Sell like hot cakes": This means something is selling very quickly or is very popular.
"Sell someone a bill of goods": This means to deceive someone into believing something that is not true.
Sell off: To sell something, especially at a lower price, often quickly or to get rid of it.
Sell out: To sell all of something; also means to betray one's principles for personal gain.