1. (南亚地区的)季风季节，雨季
The monsoon is the season in Southern Asia when there is a lot of very heavy rain.

2. (雨季的)季风雨，降雨
Monsoon rains are sometimes referred to as the monsoons .

1. a seasonal wind in southern Asia
blows from the southwest (bringing rain) in summer and from the northeast in winter

2. any wind that changes direction with the seasons

3. rainy season in southern Asia when the southwestern monsoon blows, bringing heavy rains