1. to decrease in size, extent, or degree; to become smaller or weaker
2. to approach an end; to draw to a close

1. a gradual decrease in size, extent, or degree
2. the period when the moon appears to decrease in size
Usage: astronomy

Examples

• The moon will wane after the full moon phase.
• His enthusiasm began to wane as the project dragged on.
• The storm’s intensity started to wane by morning.
• Her influence in the company is on the wane.
• The old tradition is slowly waning in modern society.
• Summer’s heat will wane as autumn approaches.
• The wane of the empire took several centuries.