Definitions of sell:

• noun:   the activity of persuading someone to buy

  Example: "It was a hard sell"

• verb:   give up for a price or reward
• verb:   exchange or deliver for money or its equivalent

  Example: "She sells her body to survive and support her drug habit"

• verb:   be sold at a certain price or in a certain way

  Example: "These books sell like hot cakes"

• verb:   be responsible for the sale of
• verb:   be approved of or gain acceptance
• verb:   persuade somebody to accept something

  Example: "The French try to sell us their image as great lovers"

• verb:   do business; offer for sale as for one's livelihood

  Example: "The brothers sell shoes"

• verb:   deliver to an enemy by treachery
• name:  A surname (rare: 1 in 33333 families; popularity rank in the U.S.: #3567)