a valve in a pipe or channel having a sliding plate that controls the flow
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Examples from the Web for gate valve
Historical Examples of gate valve
A gate-valve is placed in the branch pipe at its junction with the pipe line.