"Oval" is a versatilewordused todescribe a rounded, egg-likeshape. You can useit in everydaylanguage to describeobjectsor in moreadvancedcontexts to talk aboutmathematical shapes.
Adjective
roundedlike an egg
Noun
a closedplanecurveresulting from the intersection of a circularcone and a planecuttingcompletelythroughit
the sums of the distances from the foci to anypointon an ellipse is constant