Car sales have turned more solid in the last few weeks, for example.

Replies: I'm not aware of any element that turns solid when heated.

Also, when utilizing her powers, Storm's eyes turn solid white.

The sound waves are turning solid in the air.

In the next moment the night seemed to turn solid with the onrushing shapes of mounted men.

He'd covered maybe ten feet when the shadow of a beam seemed to turn solid and stick a knife in him.

If the air had turned black, the sea, for all I knew, might have turned solid.

She turned solid in the room, however; any light stronger than moonlight did that to her.

The blackness turns solid and the silence is now absolute, as in a desert without wind.

Even a melted cheese eventually turns solid again, after enough moisture is cooked off.