Plain English Meaning
A wing cross-section made of straight, flat surfaces that come to sharp points at the front and back, shaped a bit like a stretched diamond. It is built for aircraft that fly faster than the speed of sound.
Full Definition
An airfoil shape formed by two flat surfaces meeting at a sharp angle on both the upper and lower sides, producing a cross-section that looks like two wedges joined together. It is designed for efficient flight at supersonic speeds, where sharp leading and trailing edges reduce shock wave drag.
Context Anchor
Seen in airfoil design diagrams and discussions comparing different wing cross-section shapes.