1. the quality or state of being level, flat, or even
2. the quality of being balanced, steady, or calm

Examples

• The carpenter checked the levelness of the floor before installing the cabinets.
• The table’s levelness was perfect for the delicate experiment.
• She admired the levelness of the tennis court’s surface.
• His levelness under pressure impressed the entire team.
• The pilot maintained perfect levelness during the turbulent flight.
• The surveyor measured the levelness of the construction site.