(idiomatic) To pursue something illusory, impractical, or impossible.

A round wooden stool used by piano players. It is less stable than the rectangular piano bench. The height can be adjusted by simply spinning the seat clockwise or counterclockwise, respectively.

(idiomatic) To the greatest extent or to completion; to a state of refinement or perfection.

(geology) A map showing ground movement and shaking intensity following major earthquakes.