Airspeed

Rarity: Common

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Notion

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Science and technology

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What Wikipedia says

In aviation, airspeed is the speed of an aircraft relative to the air it is flying through (which itself is usually moving relative to the ground due to wind). In contrast, the ground speed is the speed of an aircraft with respect to the surface of the Earth (whether over land or presumed-stationary water).

Excerpt from the Wikipedia article “Airspeed”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: U.S. Federal Aviation Administration, Public domain, via Wikimedia Commons.