Trivial, small-minded (5)
I believe the answer is:
petty
I believe this is a double definition.
'trivial' is the first definition.
(I know that trivial can be written as petty)
'small-minded' is the second definition.
(synonyms)
(Other definitions for petty that I've seen before include "Trifling" , "Insignificant or trivial" , "Trivial, piffling" , "Unimportant" , "Trivial - small-minded" .)