1. the quality or state of being flattened at the poles, as in the shape of Earth or other rotating celestial bodies
Usage: astronomy; geography

Examples

• The Earth’s oblateness is caused by its rotation, making it slightly wider at the equator.
• Scientists measure the oblateness of planets to understand their internal structure.
• Jupiter shows significant oblateness due to its rapid rotation.
• The satellite data revealed the moon’s slight oblateness.
• Geodesists study Earth’s oblateness to improve mapping accuracy.
• The planet’s oblateness affects how gravity varies across its surface.