national grid 
noun British
1The network of high-voltage power lines between major power stations.Right now Lewis is connected to the national grid by a one-way powerline that enters the water at Ardmore bay on Skye....
- When Fawley power station is on-line it supplies 500 megawatts to the national grid - that's more or less enough power to keep Southampton alight.
- National Grid revealed today that the power line was now carrying electricity to supply the national grid.
2The metric system of geographical coordinates used in maps of the British Isles.
- nerve gas
- nerve glue
- nerve growth factor
- nerve impulse
- nerve-knot
- nerveless
- nervelessly
- nervelessness
- nervelet
- nerve net
- nerve path
- nerve pathway
- nerve patient
- nerve physiologist
- nerve physiology
- nerve poison
- nerve-racking
- nerve ring
- nerve root
- nerve route
- nerve sheath
- nerve specialist
- nerve storm
- nerve tip
- nerve tonic