1.  commerce secretary(n = noun.person) secretary of commerce - the person who holds the secretaryship of the Department of Commerce; "the first Commerce Secretary was William C. Redfield who was appointed by Wilson"
is a kind of secretary

2.  commerce secretary(n = noun.act) secretary of commerce - the position of the head of the Department of Commerce; "the position of Commerce Secretary was created in 1913"
is a kind of secretaryship
is a member of united states cabinet, us cabinet

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