(geometry) An angle of 360 degrees; a full circle.

(obsolete, idiomatic) To beg out of a prison window with a cap, or box, let down at the end of a long string.

(geometry) Of a triangle, having an obtuse angle.

(cinematography, photography) Of or pertaining to a short focal length lens that has an angle of view greater than about 70°; of or pertaining to an image produced with such a lens.

(geometry) Of a triangle, having three acute angles.

(geometry) An angle that, when added to another referenced angle, produces a right angle.

(geometry) Half of the angle formed by a single straight line, equivalent to 90 degrees. / (mathematics) An ∟ character.

(optics, physics) The angle that a straight line, ray of light, etc., meeting a surface, makes with a normal to the surface at the point of meeting.

(geometry) The inner angle between two sides of a polygon.

(aeronautics) The angle between the chord line of an airfoil and the airflow over it; one of the determiners of the amount of lift produced by an airfoil.