■ noun a line or outline which gradually deviates from being straight for some or all of its length.
↘a line on a graph (whether straight or ~d) showing how one quantity varies with respect to another.
↘(also ~ ball ) Baseball a delivery in which the pitcher causes the ball to deviate from a straight path by imparting spin.
■ verb form or cause to form a ~.
ME: from L. curvare 'to bend', from curvus 'bent'.