na‧tion‧al1 S1 W1
related to a whole nation as opposed to any of its parts [↪ local]:
Religion matters very much at a national level.
Between 1929 and 1933 America's national income fell by more than half.
There are strong indications that the Prime Minister will call national elections in May.
relating to one particular nation as opposed to other nations [↪ international]:
We refuse to sign any treaty that is against our national interests.
3 [only before noun]PG
owned or controlled by the central government of a country:
the National Institute for Space Research
the national airline