a river steamboat on which theatrical performances could be given (especially on the Mississippi River)
例句
用作名词 (n.)
An armed man involved in an overnight standoff with police outside the Showboat Casino in Atlantic City has surrendered peacefully. 在大西洋城的一名全副武装的男子终于向在演戏船娱乐场守侯了一整晚的警方缴械投降。