A 'wind' is simply the flow of a huge amount of air, usually from a high pressure-area to a low-pressure area.
How are winds formed?
Typically, this begins with the sun’s radiation, which is absorbed differently on the earth’s surface. The earth's surface is heated differently because of scenarios like cloud cover, mountains, valleys, water bodies, vegetation and desert lands.
As a result of this uneven heating, there are bound to be earth surfaces that vary a lot in temperature. Air on surfaces with higher temperatures
will then begin to rise because it is lighter (less dense). As the air rises, it creates low atmospheric pressure.
Air on surfaces with cooler temperatures sink (do not rise). The sinking creates higher atmospheric pressure.
Is called the wind.
This behaviour or warm gases or liquids moving upward and being replaced by cooler particles is called wind.