n. An administrator immediately subordinate to a head of a government department or to a member of a cabinet
the GNU version of the Collaborative International Dictionary of English
n. A secretary who is subordinate to the chief secretary; an assistant secretary.
The Century Dictionary and Cyclopedia
n. A secretary subordinate to the principal secretary: as, an under-secretary for Ireland.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a secretary immediately subordinate to the head of a department of government
Word Usage
"The fact that you would want to appoint Sarah Palin undersecretary for Robot Affairs shows just how unserious you are about Human/Robot relations, Peter K."