The Collaborative International Dictionary of English v.0.48:

I \I\ ([imac]), pron. [poss. My (m[imac]) or Mine
   (m[imac]n); object. Me (m[=e]). pl. nom. We (w[=e]);
   poss. Our (our) or Ours (ourz); object. Us ([u^]s).]
   [OE. i, ich, ic, AS. ic; akin to OS. & D. ik, OHG. ih, G.
   ich, Icel. ek, Dan. jeg, Sw. jag, Goth. ik, OSlav. az', Russ.
   ia, W. i, L. ego, Gr. 'egw`, 'egw`n, Skr. aham. [root]179.
   Cf. Egoism.]
   The nominative case of the pronoun of the first person; the
   word with which a speaker or writer denotes himself.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Our \Our\ (our), possessive pron. [AS. [=u]re our, of us; akin
   to [=u]s us, to us, and to G. unser our, of us, Goth. unsara.
   [root]186. See Us.]
   Of or pertaining to us; belonging to us; as, our country; our
   rights; our troops; our endeavors. See I.
   [1913 Webster]

         The Lord is our defense.                 --Ps. lxxxix.
                                                  18.
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   Note: 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.
         [1913 Webster]

               Our wills are ours, we know not how. --Tennyson.
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The Collaborative International Dictionary of English v.0.48:

-our \-our\suff. [OF. -our.]
   See -or.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

We \We\ (w[=e]), pron.; pl. of I. [Poss. Our (our) or Ours
   (ourz); obj. Us ([u^]s). See I.] [As. w[=e]; akin to OS.
   w[imac], OFries. & LG. wi, D. wij, G. wir, Icel. v[=e]r, Sw.
   & Dan. vi, Goth. weis, Skr. vayam. [root]190.]
   The plural nominative case of the pronoun of the first
   person; the word with which a person in speaking or writing
   denotes a number or company of which he is one, as the
   subject of an action expressed by a verb.
   [1913 Webster]

   Note: We is frequently used to express men in general,
         including the speaker. We is also often used by
         individuals, as authors, editors, etc., in speaking of
         themselves, in order to avoid the appearance of egotism
         in the too frequent repetition of the pronoun I. The
         plural style is also in use among kings and other
         sovereigns, and is said to have been begun by King John
         of England. Before that time, monarchs used the
         singular number in their edicts. The German and the
         French sovereigns followed the example of King John in
         a. d. 1200.
         [1913 Webster]