: a wind blowing in a direction not parallel to a course (as of an airplane)

What is cross wind effect?

The chief effect of the cross wind is to deflect the flight path in the direction of the wind. The aerodynamic lift force depends on the airspeed and is not related to a constant cross wind. The cross wind simply adds another vector component to the ground speed which affects the flight trajectory.

What is meant by cross wind component?

In aviation, a crosswind is the component of wind that is blowing across the runway, making landings and take-offs more difficult than if the wind were blowing straight down the runway. If a crosswind is strong enough, it can damage an aircraft's undercarriage upon landing.