Impressive month (6)
I believe the answer is:
august
I believe this is a double definition.
'impressive' is the first definition.
(I've seen this before)
'month' is the second definition.
(August is an example)
(Other definitions for august that I've seen before include "Revered" , "Inspiring respect and admiration" , "Eighth month" , "nomination for Strindberg" , "Grand, lordly" .)