Noun

1. A closed curve, the locus of a point such that the sum of the distances from that point to two other fixed points (called the foci of the ellipse) is constant; equivalently, the conic section that is the intersection of a cone with a plane that does not intersect the base of the cone.

Verb

1. To remove from a phrase a word which is grammatically needed, but which is clearly understood without having to be stated.

   In the exchange:- (A.Would you like to go out?, B.I'd love to), the ellipsed words are go out.