The phrase "national magazines" refers to publications that are available and widely read throughout an entire country, rather than being limited to a specific region or locality. Full definition
His work is in more than 2,000 private collections and has been featured in national magazines. (daytoncitypaper.com)
The disclosure made the pages of national magazines and showed that theories about the origin of life could actually be tested in the laboratory. (scientificamerican.com)
It marked the first time that a studio has revealed a principal cast of film characters on sequential national magazine covers. (mediamikes.com)