1. becoming smaller, weaker, or less; decreasing

1. the process of becoming smaller or weaker; a gradual decrease

Examples

• The waning moon appeared as a thin crescent in the sky.
• Her interest in the project was clearly waning.
• The waning daylight made it difficult to see.
• The politician’s popularity showed signs of waning.
• The waning of summer brought cooler temperatures.
• His influence in the company was on the waning.
• The waning enthusiasm of the crowd was obvious.