To gather in dense groups.
To form clusters or lumps.
To walk with heavy footfalls.
To strike; to beat.
A thick group or bunch, especially of bushes or hair.
A small group of trees or plants.
A cluster or lump; an unshaped piece or mass.
A dull thud.
A thick addition to the sole of a shoe.
The compressed clay of coal strata.
A blood clot formed from platelets and other elements that forms in a blood vessel in a living organism, and causes thrombosis or obstruction of the vessel at its point of formation or travel to other areas of the body.