Article, object (4)
I believe the answer is:
item
I believe this is a double definition.
'article' is the first definition.
(both can mean an object or thing)
'object' is the second definition.
(both can mean a thing)
(Other definitions for item that I've seen before include "Two in a romantic relationship?" , "One of a series (or a couple!)" , "Separate object or unit" , "Detail - entry" , "Entry (in an account)" .)