Source : Webster's Revised Unabridged Dictionary (1913)

Of \Of\, prep. [AS. of of, from, off; akin to D. & OS. af, G. ab
   off, OHG. aba from, away, Icel., Dan., Sw., & Goth. af, L.
   ab, Gr. ?, Skr. apa. Cf.{Off}, {A-} (2), {Ab-}, {After},
   {Epi-}.]
   In a general sense, from, or out from; proceeding from;
   belonging to; relating to; concerning; -- used in a variety
   of applications; as:

   1. Denoting that from which anything proceeds; indicating
      origin, source, descent, and the like; as, he is of a race
      of kings; he is of noble blood.

            That holy thing which shall be born of thee shall be
            called the Son of God.                --Luke i. 35.

            I have received of the Lord that which also I
            delivered unto you.                   --1 Cor. xi.
                                                  23.

   2. Denoting possession or ownership, or the relation of
      subject to attribute; as, the apartment of the consul: the
      power of the king; a man of courage; the gate of heaven.
      ``Poor of spirit.''                         --Macaulay.

   3. Denoting the material of which anything is composed, or
      that which it contains; as, a throne of gold; a sword of
      steel; a wreath of mist; a cup of water.

   4. Denoting part of an aggregate or whole; belonging to a
      number or quantity mentioned; out of; from amongst; as, of
      this little he had some to spare; some of the mines were
      unproductive; most of the company.