When referring to wind conditions, a wind not parallel to the runway or the path of an aircraft. Fr: vent de travers

Wind blowing across the takeoff run or a models flight path.

A wind blowing from right to left or vice versa.

A wind blowing in a direction perpendicular to the course of a moving object.

A wind blowing perpendicular to the course of a moving object. Often used when referring to winds affecting ballistics.

The component of wind speed that is blowing at 90° to the track of an aircraft or course of a vessel.

wind blowing across the path or a ship or aircraft

Complex intersections of wind that are caught whilst passing through the boundaries of wind layers at different altitudes.

Flight path at right angle to the runway at departure end.

The dog proceeds with the wind at either side.

A wind blowing across the line of flight of an aircraft.

Wind that comes from the side. Bad news for riders

Wind blowing from the side, not coinciding with the path of flight.

Wind blowing across the runway. Crosswind also refers to the phase of a landing approach where the aircraft is flying perpendicular to the runway center line at the departure end.

wind that has a component directed perpendicularly to the course (or heading) of an exposed, moving object; more popularly, a wind that predominantly acts in this manner. In the broadest sense, any wind except a direct headwind or direct tailwind is a crosswind. The drift produced by crosswind is critical to air navigation, being especially dangerous during landing and takeoff.

Wind that comes from either side.

A crosswind is any wind that is blowing perpendicular to a line of travel, or perpendicular to a direction. For example, in aviation, a crosswind is the component of wind which is blowing 90 degrees to the runway, making a landing more difficult than if the wind were blowing straight down the runway. In fact if a crosswind is strong enough it may exceed an aircraft's crosswind limit, and attempting to land under such conditions could cause structural damage to the aircraft's undercarriage.