1. a movement or action that opposes or resists another movement, especially a social or political one
Usage: often used in sociology and political contexts
2. in exercise or biomechanics, a preparatory movement in the opposite direction before executing the main movement
Usage: technical usage in sports and fitness

Examples

• The civil rights movement sparked a countermovement among those opposed to social change.
• Environmental activists faced a well-funded countermovement from industry groups.
• A countermovement against the new policy quickly gained support online.
• In weightlifting, the countermovement before the jump helps generate more power.
• The feminist movement encountered organized countermovements throughout the 20th century.
• Athletes use a countermovement to prepare their muscles for explosive action.