Webster's Revised Unabridged Dictionary · 1913

Our

Our (our) , possessive pron.

[Anglo-Saxon ūre our, of us; akin to ūs us, to us, and to German unser our, of us, Gothic unsara. r186. See Us.]

Of or pertaining to us; belonging to us; as, our country; our rights; our troops; our endeavors. See I.
The Lord is our defense. — Bible (KJV) - Psalm lxxxix. 18
Our wills are ours, we know not how. — Tennyson

When the noun is not expressed, ours is used in the same way as hers for her, yours for your, etc.; as, whose house is that? It is ours.

-our , suffix

[Old French -our.]

See -or.