| 1. | the seasonal wind of the Indian Ocean and southern Asia, blowing from the southwest in summer and from the northeast in winter. |
| 2. | (in India and nearby lands) the season during which the southwest monsoon blows, commonly marked by heavy rains; rainy season. |
| 3. | any wind that changes directions with the seasons. |
| 4. | any persistent wind established between water and adjoining land. |

A wind system that affects large climatic regions and reverses direction seasonally.
Note: The Asiatic monsoon brings heavy rains to Southeast Asia in spring and summer.