Older or elder (6)
I believe the answer is:
senior
I believe this is a double definition.
'older' is the first definition.
(synonyms)
'elder' is the second definition.
(synonyms)
(Other definitions for senior that I've seen before include "Older or higher in standing" , "Being old" , "More advanced in years or authority" , "High-ranking" , "Higher in rank or authority" .)