Entry 4 senses · 2 variants Webster, 1913 Rotund /rōt-ŭnd'/ · Ro·tund · IPA /ɹoʊˈtʌnd/ a. n. 01 a. Round; circular; spherical. 1. Round; circular; spherical. 2. Hence, complete; entire. 3. orbicular, or nearly so.(Bot.) 02 n. A rotunda. 1. A rotunda.[Obs.]