lock in
• shut someone into a room or space by locking or fastening a door, lid, etc.
• "the prisoners are locked in overnight"
• be involved in a struggle or competitive situation.
• "they were locked in a legal battle"
lock away
• imprison someone.
• "Edmond is locked away in the island fortress"
lock-in
noun
• an arrangement according to which a person or company is obliged to deal only with a specific company.
• a period during which customers are locked into a bar or pub after closing time to continue drinking privately.
• a protest demonstration in which a group locks itself within an office or factory.
have a lock on
• have total control over.
• "he has a lock on much of the political establishment in Georgia"
