1. to remove someone from a position of power or authority, especially in an election
Usage: political context
2. to cause someone to fall from a horse or bicycle
Usage: literal sense

Examples

• The challenger unseats the incumbent governor in a surprising victory.
• A strong campaign helped her unseat the long-serving senator.
• The sudden stop unseats the rider from his bicycle.
• The bucking horse unseats every cowboy who tries to ride it.
• Voters decided to unseat several city council members.
• The rocky terrain unseats many inexperienced mountain bikers.