The quality or state of being round in shape. The roundness of the ball made it perfect for playing soccer.
The roundness of the sculpture added to its aesthetic appeal.
The quality of being complete or whole. The roundness of the story left no questions unanswered.
(engineering, metrology) A quantitative measure of how closely the cross-section of an object approximates a perfect circle. Precision engineers checked the roundness of the bearing surface with a specialized gauge.