No, a circle is a two-dimensional shape, whereas the Earth has three-dimensions.
Many people assume Earth is a sphere, however the Earth is wider at the equator than it is tall at the poles. This shape is described as an oblate spheroid.
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The shape of the Earth is actually a rather complex figure called a geoid, which just means "Earth-shaped". It's roughly an ellipsoid (which is itself pretty close to a sphere), but one where the Southern Hemisphere bulges just a tiny more than the northern one, making it very slightly pear-shaped (with additional bulges in various places).
If by revolution you mean the spin on it's own axis this is more or less a perfect circle. If you are referring to it's orbit around the sun, this is elliptical, not a perfect circle.
The Earth rotates in not a perfect circle around the sun but in a oval shape.
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Earth's shape is oblate spheroid.