There are 2 definitions of National Road in English:

National Road1

Syllabification: Na·tion·al Road

Entry from US English dictionary

A historic highway that in the early 19th century led from Maryland through the Appalachian Mountains to St. Louis in Missouri. It was once the major route for western expansion.

Definition of National Road in:

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Word of the day flippant
Pronunciation: ˈflipənt
adjective
not showing a serious or respectful attitude

There are 2 definitions of National Road in English:

national road2

Line breaks: na|tion¦al road

noun

(In South Africa) any of a network of major intercity roads: the old national road tells you you are going somewhere important
More example sentences
  • The deputy director in the Department of Transport warned: ‘We are armed with a programme of roadblocks on all the major national roads.’
  • The improvements of this section of the N1 will ultimately benefit road users, says a statement by the National Roads Agency, and is an intervention by Sanral to preserve South Africa's national roads.
  • As I recall, it was introduced by PW Botha to pay for the maintenance and improvement of the national roads network, but was diverted straight into the defence budget.