- noun an oval shape or course
- One of the conic sections, of special importance in astronomy because most orbits are elliptical. Instead of having a single centre, like a circle, an ellipse has two foci and the object being orbited – like the Sun in the solar system – lies at one of them.
- A geometric shape consisting of a closed curve in the shape of an elongated circle. A circle is also a type of ellipse.
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