<p><strong>Adjective</strong></p><ul><li>having a surface that is curved or rounded outward.</li><li>(of a polygon) having all interior angles less than or equal to 180°.</li><li>(of a set) having the property that for each pair of points in the set the line joining the points is wholly contained in the set.</li></ul><p><strong>Noun</strong></p><ul><li>a convex surface, part, or thing.</li></ul>