tailwind

Pronunciation: /ˈteɪlwɪnd/

The English word “tailwind” has 3 meanings listed here.

noun

A wind that blows in the same direction as the course taken by an aircraft, sailing ship, bird, etc.; a following wind.
A force that accelerates progress.

Of a wind, to blow on a windmill or wind turbine in such a way that wind pressure is exerted on the wrong side of the sail or turbine assembly.

From tail + wind.

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.