1. the quality or state of having lumps or being uneven with bumps

Examples

• The lumpiness of the mattress made it difficult to sleep.
• She noticed the lumpiness in the cake batter and mixed it more thoroughly.
• The road’s lumpiness caused the car to bounce uncomfortably.
• The doctor examined the lumpiness under the patient’s skin.
• The lumpiness of the mashed potatoes indicated they needed more mixing.
• He complained about the lumpiness of his pillow.