n. a gradual decrease in magnitude or extent
a. (of the Moon) pertaining to the period during which the visible surface of the moon decreases
n. 减弱;月亏
1. The moon is waning, which means it will soon be a new moon.
月亮正在减亏,这意味着它很快将变成新月。
2. His enthusiasm for the project is waning as the deadline approaches.
随着截止日期的临近,他对这个项目的热情正在减退。
3. The waning interest in the event led to fewer attendees this year.
对这个活动的兴趣减退导致今年的参与者更少。