6.The Hoover Library covers “Hoover-ball”, a tennis-volleyball hybrid that Herbert Hoover played with staff and cabinetmembers on the White House lawn each morning.
7.By 1599, a third sense had arisen, that of someone authorized to act in the name of the principal, especially in matters of government affairs. Hence the titles of US cabinetmembers who act in the name of the president.
14.Denoting leading members of the Opposition party who would probably be Cabinet ministers if their party became the Government, and who act as spokesmen on matters for which they would then be responsible