‖n. A Dutch silver coin, worth about $1.00. [ 1913 Webster ]

n. One who riddles (grain, sand, etc.). [ 1913 Webster ]

n. One who speaks in, or propounds, riddles. [ 1913 Webster ]

The Riddler [ Capitalized ] A fictional character in the Batman comic books series and also in the Batman series of movies. He was an enemy of Batman who proposed riddles. [ PJC ]