The acute angle at which a moving airfoil meets the airstream.

the angle at which the club impacts the ball. That angle can be steep or shallow, descending or ascending. Ball flight, backspin and distance are all affected by angle of attack.

Angle of Attack is the vertical angle at which the club head is moving at impact. A positive AoA means you are hitting up on the ball, a negative AoA means you are hitting down. Angle of Attack is a main component of Spin Loft and, thus, spin. One of the major discoveries in golf science is that having a shallow (or positive, with the driver) AoA i [..]

The up or down movement of the club head at impact. Attack angle is measured relative to the horizon. Shots hit off the ground should have a negative (downward) attack angle whereas shots from a tee should have a positive (upward) angle of attack.

The angle at which the clubhead descends toward the golf ball on the downswing. A steep angle of attack would come from a fairly upright swing, while a shallow angle of attack would come from a flatter swing plane.

The angle of a wing to the oncoming airflow. A pilot pulls back on the control stick to raise the elevator. This causes the aircraft to pitch which increases the angle of attack.

The acute angle at which a moving airfoil meets the airstream.

In aerodynamics, the angle at which the wing meets the airflow. If correctly angled, the result is the force of lift.

59.3 percent. This is the theoretical maximum efficiency at which a wind generator can operate, by slowing the wind down.  If the wind generator slows the wind down too much, air piles up in front of the blades and is not used for extracting energy.

The angle of relative air flow to the blade chord.

The acute angle at which a moving airfoil meets the air stream.

The angle between the relative wind and the chord line of the wing.

The difference between pitch and the air-referenced flight path angle; the angle between the aircraft center line and the airspeed vector in the vertical plane, positive when the nose is up; Symbols: alpha; Typical Units: rad, deg;

The angle at which the wing of a plane meets the oncoming air, i.e. whether it is head-on, or tilted up or down. A high angle of attack is when the wing is tilted strongly upwards and providing a wide [..]

in the theory of airplane wings, the angle between the wing profile (roughly, measured along its bottom) and the wing's motion relative to the surrounding air.

The angle between the sponson's planing surface and the surface of the water.

(1) The angle between the sail and the apparent wind : (2) The angle rudder or centerline (keel) to the flow of water.

A.K.A. Alpha, AOA. An engineering term represented by the Greek letter 'Alpha' (Α); measured as the angle between the airfoil chord line and the relative wind. Note spelling is not the same [..]

the angle between the chord of a sail and the relative wind or between the chord of a hydrofoil such as a keel or rudder and a vector line representing the true path through the water, taking the amou [..]

The angle between the sail and the apparent wind or the rudder or centerline and the water flow.

The angle between the cord line of the wing (mean chord line) and the relative wind.

The angle that the wing penetrates the air. As the angle of attack increases so does lift, up to a point (and drag).

Angle of the wing relative to the forward flight path of the airplane. On any aircraft, too great an angle of attack will cause the wing to stop flying (stall), as airflow across the upper surface is [..]

Pick-up lines that pilots use.

The angle formed by an aircraft’s direction of flight and its longitudinal axis.

The difference between pitch and the air-referenced flight path angle; the angle between the aircraft center line and the airspeed vector in the vertical plane, positive when the nose is up; Symbols: [..]

The angle at which an aircraft wings meet the air stream. Despite the word “attack,” it is not related to weapons, and applies to all aircraft.

Angle at which the air-stream meets an aerofoil surface.

The angle of the trajectory of the shuttle upon leaving one's racket. A steep angle means sharply downward and a flat angle is closer to horizontal. Where this becomes important is for attacking [..]

The angle between the velocity vector and the longitudinal axis of a missile or rocket.

angle formed by the intersection of the fluid flow direction towards a foil with a straight line drawn from the foils leading edge to its trailing edge