noun. A wind blowing directly against the course of a moving object, such as an aircraft, bird, or runner.

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

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

"The new term headwind created by these adverse dynamics in FM Tuners for handsets and modems for customer premise equipment is a frustrating, but essential part of the ongoing improvement in the complexion of our own business."

tailwind  

air current  current of air  wind  

brandy-and-soda  business  car-warrior  d  dfn