clump /klʌmp/noun 6verb 4forms 3phrases 1 noun6 •A cluster or lump; an unshaped piece or mass. •A thick group or bunch, especially of bushes or hair.There are suitable clumps of gorse a little way back, sir. I anticipate that you would be quite safe there, or I would not suggest it, sir. — 1927 •A small group of trees or other plants growing together. •A dull thud.She [Miss Climpson] asks questions which a young man could not put without a blush. She is the angel that rushes in where fools get a clump on the head. — 1927 •A thick addition to the sole of a shoe. •The compressed clay of coal strata.clump-burned bricks — 1837 verb4 •To form clusters or lumps. •To gather in dense groups. •To walk with heavy footfalls. •(UK) To strike; to beat. formsclumped · clumping · clumps Phrases with clump clump upTo become clumpy; to form a clump.