A slot machine’s "lockout" feature is a safety mechanism designed to prevent the machine from being played for a period of time or under certain conditions, often activated during specific situations like maintenance or when a payout is being processed. When this feature is engaged, the machine will not accept new bets or allow play until it is reset by the casino staff or until the issue prompting the lockout is resolved. This feature helps ensure the proper functioning of the machine and prevents unauthorized access, thereby adding a layer of security and integrity to the gameplay experience.