1.  transportation secretary(n = noun.person) secretary of transportation - the person who holds the secretaryship of the Department of Transportation; "Johnson appointed Alan S. Boyd as the first Transportation Secretary"
is a kind of secretary

2.  transportation secretary(n = noun.act) secretary of transportation - the position of the head of the Department of Transportation; "the post of Transportation Secretary was created in 1966"
is a kind of secretaryship
is a member of united states cabinet, us cabinet

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