ˌmuch-ˈvaunted BrE AmE adjective [only before noun]
a much-vaunted plan, achievement etc is one that people say is very good or important, especially when this may not be true:
the president’s much-vaunted health care plan
MUCH-VAUNTED
Meaning of MUCH-VAUNTED in English
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012