An overwhelming defeat is a situation in which one side is completely and utterly defeated. The term can be used to describe a variety of scenarios, from military battles to political elections. In a crossword puzzle, the term can be represented by the solutions ROUT (4 letters), LANDSLIDE (9 letters), and SEA (3 letters). ROUT is a verb meaning to defeat decisively, while LANDSLIDE is a noun referring to an overwhelming victory or defeat. Finally, SEA is a noun meaning a large body of water.