This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. A wind blowing directly against the course of an aircraft or ship.

n. A wind that blows directly against the course of an aircraft or ship.

n. wind blowing opposite to the path of a ship or aircraft

"A solitary swallow struggling against the headwind is still managing to make progress on its southerly journey."

tailwind   

wind    air current    current of air   

microfiber    up-grade    westerling    dfn    piscine    quarrying    d    sole-leather    writing paper    northeaster