1. past tense of clump; formed into a thick group or mass
2. past tense of clump; walked with heavy, noisy steps

1. formed into thick groups or masses

Examples

• The wet sand clumped together in her hands.
• The students clumped around the teacher to hear the announcement.
• He clumped up the stairs in his heavy boots.
• The flour clumped when it got damp.
• The clumped soil needed to be broken up before planting.
• She clumped across the wooden floor, waking everyone up.
• The paint had clumped in several spots on the wall.