\Ro*tund"i*ty\, n. [L. rotunditas: cf. F. rotondit['e].] 1. The state or quality of being rotu?; roundness; sphericity; circularity. Smite flat the thick rotundity o'the world! --Shak. 2. Hence, completeness; entirety; roundness. For the more rotundity of the number and grace of the matter, it passeth for a full thousand. --Fuller. A boldness and rotundity of speech. --Hawthorne.