Denoting or relating to the part of a political administration with responsibility for putting into effect laws drawn up by the legislature.
Example中也有executive authority和the executive branch of government。行政权用executive应该看来应该是比较公认的。
但是AHD中在对administrative的解释中也有提到
often Administration
a. The executive branch of a government.
b. The group of people who manage or direct an institution, especially a school or college.