1 to obtain sb's freedom by paying money to the court 保释（某人）: Her parents went to the police station and bailed her out. 她的父母去警察局保释了她。

2 to rescue sb or sth from a difficult situation (especially by providing money) 解救，解困（尤指用金钱）: If you get into trouble don't expect me to bail you out again! 如果你惹了麻烦，别再指望我来帮你的忙！