1. a gradual reduction or elimination of something over time

Examples

• The company announced a phasedown of coal operations over the next five years.
• The military began a phasedown of troops in the region.
• Environmental groups called for a phasedown of fossil fuel subsidies.
• The phasedown of the old manufacturing plant will take two years to complete.
• Congress approved funding for the phasedown of nuclear weapons.
• The gradual phasedown allowed workers time to find new employment.