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ellipse
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As a noun, ellipse means 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. As a verb, it means remove from a phrase a word which is grammatically needed, but which is clearly understood without having to be stated.
Meanings of ellipse
2 meaningsnoun
geometryA 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
grammarTo remove from a phrase a word which is grammatically needed, but which is clearly understood without having to be stated.
“In B's response to A's question:- (A: Would you like to go out?, B: I'd love to), the words that are ellipsed are go out.”
Meanings from Wiktionary (CC BY-SA 4.0) and Open English WordNet (CC BY 4.0).