From Longman Dictionary of Contemporary Englishsecretary generalˌsecretary ˈgeneral noun [countable] Pthe most important official in charge of a large organization, especially an international organization the UN Secretary General
Examples from the Corpus
secretary general• And there are many people who are whispering that it is because the secretary general is black.• The change in the secretary general is likely to stand her in good stead with committee Chairman Jesse Helms, R-N. 