C1 the space between two lines or surfaces at the point at which they touch each other, measured in degrees:
The interior angles of a square are right angles or angles of 90 degrees.
The boat settled into the mud at a 35° angle/at an angle of 35°.
at an angleC1 not horizontal or vertical, but sloping in one direction:
The picture was hanging at an angle.
He wore his hat at a jaunty angle.
the corner of a building, table, or anything with straight sides