monsoon
/ˌmɔnˈsu:n; mɑn`sun/ n
1 seasonal wind in S Asia, esp in the Indian Ocean, blowing from SW from April to October and from NE from October to April （南亚的）季风（尤指印度洋上四月至十月的西南风和十月至四月的东北风）.
2 very rainy season that comes with the SW monsoon （西南季风带来的）雨季.