One of the mysteries of the English language finally explained.
1A valve in a piston, as in that of a piston pump.
2A valve consisting of a small piston sliding back and forth in a tube, opening or closing a hole or holes in the tube wall, as alongside the cylinder of a steam engine or in a brass musical instrument.
Mid 18th century; earliest use found in Martin Clare (d. 1751).
In this article we explore how to impress employers with a spot-on CV.