General Definition: 1. The intersection of two lines or surfaces, or any thing or any action directly or indirectly associated with this, especially an angle. As a Noun: 1. In mathematics and geometry, the difference in direction between two lines or surfaces. An angle is measured in degrees (which is written as a superscript zero after a number, e.g., 90° means "ninety degrees"). English = angle. 2. The shape that is created where two lines or surfaces join together. English = angle.