Aspect, feature (5)
I believe the answer is:
facet
I believe this is a double definition.
'aspect' is the first definition.
(I know that aspect can be written as facet)
'feature' is the second definition.
(I know that facet is a type of feature)
(Other definitions for facet that I've seen before include "Flat surface on a cut gem" , "Small surface (of diamond)" , "Particular aspect" , "Characteristic" , "Aspect - smooth cut surface" .)