A "lockout" is a work stoppage initiated by employers during labor disputes, often to prevent employees from working. This action typically occurs when negotiations between management and labor unions, such as the United Auto Workers, break down. Employers may lock out workers to pressure them into accepting new contract terms. During a lockout, employees are usually barred from entering the workplace and may not receive pay. This tactic is often used in conjunction with strikes, where workers refuse to work. Lockouts can significantly impact production and may lead to prolonged disputes between management and labor.