a network of high-voltage power lines connecting major power stations
2.
a grid of metric coordinates used by the Ordnance Survey in Britain and Ireland, and in New Zealand by the New Zealand Lands and Survey Department, and printed on their maps
Examples of 'national grid' in a sentence
national grid
For the past few decades the country has depended for its power on a national grid network, most of which is at least 40 years old.