1. the quality or state of having an uneven surface with many bumps
2. the quality of being characterized by sudden jolts or irregular movement

Examples

• The bumpiness of the old dirt road made driving difficult.
• We complained about the bumpiness of the airplane ride during turbulence.
• The bumpiness of the mattress kept me awake all night.
• The car’s worn suspension increased the bumpiness of the ride.
• She noticed the bumpiness of her skin after the allergic reaction.
• The bumpiness of the cobblestone street was hard on our feet.