Source : Webster's Revised Unabridged Dictionary (1913)

Cherubim \Cher"u*bim\, n.
   The Hebrew plural of {Cherub}.. Cf. {Seraphim}.

   Note: Cherubims, in the King James version of the bible, is
         an incorrect form, made by adding the English plural
         termination to the Hebrew plural cherubim instead of to
         the singular cherub.

Cherub \Cher"ub\, n.; pl. {Cherubs}; but the Hebrew plural
   {Cherubim}is also used. [Heb. ker[=u]b.]
   1. A mysterious composite being, the winged footstool and
      chariot of the Almighty, described in --Ezekiel i. and x.

            I knew that they were the cherubim.   --Ezek. x. 20.

            He rode upon a cherub and did fly.    --Ps. xviii.
                                                  10.

   2. A symbolical winged figure of unknown form used in
      connection with the mercy seat of the Jewish Ark and
      Temple. --Ez. xxv. 18.

   3. One of a order of angels, variously represented in art. In
      European painting the cherubim have been shown as blue, to
      denote knowledge, as distinguished from the seraphim (see
      {Seraph}), and in later art the children's heads with
      wings are generally called cherubs.

   4. A beautiful child; -- so called because artists have
      represented cherubs as beautiful children.

Source : WordNet®

cherubim
     See {cherub}

cherub
     n 1: a sweet innocent baby
     2: an angel of the second order whose gift is knowledge;
        usually portrayed as a winged child
     [also: {cherubim} (pl)]