Another sign is the leaking part of the root that causes a compact mass to form between it and the sand.

There were perhaps a hundred people coming up the road in a compact mass.

I looked up at the sky and saw that the clouds were one dark, lurid, compact mass.

And - A compact mass crashed into his legs.

It was a compact mass, offering no obvious holes.

It parted to show a compact mass of fibers.

Helmets and shields were advancing upon their camp in a compact mass.

In his chair Harry had gradually squeezed himself into a more compact mass, hunching down.

More often the mineral is found as compact or granular masses.

Place a heavy skillet or baking dish on top to press the potatoes into a compact mass.