prep. before, in front of (e.g., "My husband jogged ahead of me"); in advance of (e.g., "I got to the airport ahead of the others"); superior to (e.g., "My son is substantially ahead of the other students")
AHEAD OF
Meaning of AHEAD OF in English
Explanatory English dictionary bed edition. Толковый словарь английского языка Редакция bed. 2012