Synonym: market, peddle, vend. Antonym: buy. Similar words: seller, sell off, sell out, self-, itself, cell, tell, bell. Meaning: [sel] 
n. the activity of persuading someone to buy. v. 1. exchange or deliver for money or its equivalent 2. be sold at a certain price or in a certain way 3. do business; offer for sale as for one's livelihood 4. persuade somebody to accept something 5. give up for a price or reward 6. deliver to an enemy by treachery 7. be approved of or gain acceptance 8. be responsible for the sale of.
n. the activity of persuading someone to buy. v. 1. exchange or deliver for money or its equivalent 2. be sold at a certain price or in a certain way 3. do business; offer for sale as for one's livelihood 4. persuade somebody to accept something 5. give up for a price or reward 6. deliver to an enemy by treachery 7. be approved of or gain acceptance 8. be responsible for the sale of. 
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181. Most criminals steal in order to sell their loot for cash on the black market.
182. After the war, we had to sell off part of the farm.
183. I want to sell some of my things, but they aren't worth much.
184. We have an understanding that/There is an understanding between us that we will not sell to each other's customers.
185. We sell a lot of these to people like yourself.