noun
: a valve closed or opened at will (as by hand) for preventing or regulating flow (as of a liquid in a pipe) ; specifically : the valve in an engine steam pipe for controlling or checking the passage of steam
noun
: a valve closed or opened at will (as by hand) for preventing or regulating flow (as of a liquid in a pipe) ; specifically : the valve in an engine steam pipe for controlling or checking the passage of steam
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012