What is the meaning of Sell_out?

To sell all of a product that is in stock.

To abandon or betray one's supporters or principles to seek profit or other personal advantage.

To betray (a person), usually a close friend or family member, for personal gain.

To sell one's business (with a connotative emphasis on entirety and finality).

To commit or abandon oneself entirely (to a cause, a team, etc.).

To sell one's commission.

To hurry out.

Source: wiktionary.org