that or those belonging to us: the possessive form of we, used without a following noun, often after of: this house is ours; ours are better; she is a friend of ours
Origin of oursMiddle English ures ; from ure, our + genitive -s, hence, in form, a double possessive
pron.(used with a sing. or pl. verb)
Used to indicate the one or ones belonging to us: The original of the painting is ours. Their children are grown, but ours are still young.
Origin of oursMiddle English oures, from oure, our, from Old English ūre; see nes-2 in Indo-European roots.