1. strange and unconventional behavior
2. (geometry) a ratio describing the shape of a conic section; the ratio of the distance between the foci to the length of the major axis
- a circle is an ellipse with zero eccentricity
3. a circularity that has a different center or deviates from a circular path
Sentences with eccentricity as a noun:
- For an ellipse, the eccentricity is the ratio of the distance from the center to a focus divided by the length of the semi-major axis.