Convection (noun)

1. The transfer of heat by the movement of a fluid or gas.
2. The movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and cooler, denser material to sink under the influence of gravity, which consequently results in transfer of heat.

Origin:

Derived from the latin word "convectionem" in the 16th century, meaning "carriage or movement".

Examples:

1. Convection is the primary mode of heat transfer within the Earth's atmosphere.
2. The oven has convection setting, which circulates hot air for faster and more even cooking.
3. The convection currents in the ocean play a major role in shaping the world's climate.
4. Convection is the process that causes the wind to blow and the clouds to form.
5. Convection is the transfer of heat within a fluid due to the movement of its particles.