Quadratic/kwɑːˈdrætɪk/ Definition 1 of 3Pro Tip 1/2Learning Context Understand 'quadratic' in relation to studying algebra and solving equations. Are we covering the quadratic functions next week in our math class? Pro Tip 2/2Variable Squaring 'Quadratic' often means a variable is squared (multiplied by itself). The graph of a quadratic equation creates a curved line called a parabola.