1. the quality of being strange or unusual in behavior
2. an unusual or odd characteristic or habit
3. the degree to which an ellipse deviates from a perfect circle
Usage: mathematics; astronomy

Examples

• His eccentricity made him stand out at formal events.
• She was known for her harmless eccentricities like wearing mismatched socks.
• The professor’s eccentricity included collecting vintage typewriters.
• Many artists are celebrated for their creative eccentricity.
• The orbit’s eccentricity determines how oval-shaped it is.
• Earth’s orbital eccentricity varies over thousands of years.