secretary of the interior is a noun meaning "the position of the head of the Department of the Interior". It carries 2 recorded senses.
the position of the head of the Department of the Interior
“the position of Interior Secretary was created in 1849”
the person who holds the secretaryship of the Interior Department
“President Taylor appointed Thomas Ewing as the first Secretary of the Interior”
Definitions, synonyms and semantic relations for secretary of the interior come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.