tailwind

[ teyl-wind ]

/ ˈteɪlˌwɪnd /

a wind coming from directly behind a moving object, especially an aircraft or other vehicle (opposed to headwind).

Origin of tailwind

First recorded in 1895–1900; tail¹ + wind¹

tails, tailskid, tailspin, tailstock, tailwater, tailwind, taimyr peninsula, tain, tainan, taine, taino

When Obama won Iowa in 2008, or Wisconsin, it felt like a presaging of November, like the candidate was riding a tailwind.

Michael Tomasky: No Rest for Romney After a Win in the Michigan Primary |Michael Tomasky |February 29, 2012 |DAILY BEAST
Mitt Romney blew into South Carolina on a New Hampshire tailwind and a Republican field that could do no right.

South Carolina Primary: Mitt Romney’s Bad Night |Patricia Murphy |January 22, 2012 |DAILY BEAST

tailwind

/ (ˈteɪlˌwɪnd) /

a wind blowing in the same direction as the course of an aircraft or ship Compare headwind