NOUN (2)

1. a sweet innocent baby;

2. an angel of the second order whose gift is knowledge; usually portrayed as a winged child;

The Collaborative International Dictionary of English v.0.48:

Cherub \Cher"ub\, n.; pl. Cherubs; but the Hebrew plural
   Cherubimis 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.
      [1913 Webster]

            I knew that they were the cherubim.   --Ezek. x. 20.
      [1913 Webster]

            He rode upon a cherub and did fly.    --Ps. xviii.
                                                  10.
      [1913 Webster]

   2. A symbolical winged figure of unknown form used in
      connection with the mercy seat of the Jewish Ark and
      Temple. --Ez. xxv. 18.
      [1913 Webster]

   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.
      [1913 Webster]

   4. A beautiful child; -- so called because artists have
      represented cherubs as beautiful children.
      [1913 Webster] Cherubic

WordNet (r) 3.0 (2006):

cherub
    n 1: a sweet innocent baby
    2: an angel of the second order whose gift is knowledge; usually
       portrayed as a winged child

Moby Thesaurus II by Grady Ward, 1.0:

71 Moby Thesaurus words for "cherub":
   angel, angel of light, angel of love, archangel, babe, baby,
   baby-doll, bairn, beatified soul, buttercup, canonized mortal,
   celestial, cherubim, chick, chickabiddy, child, chit, darling,
   dear, deary, doll, duck, duckling, heavenly being, hon, honey,
   honey bunch, honey child, innocent, kid, kitten, lamb, lambkin,
   little bugger, little fellow, little guy, little innocent,
   little one, little tad, little tot, love, lover, martyr,
   messenger of God, mite, nipper, offspring, patron saint, peewee,
   pet, petkins, precious, precious heart, principality,
   recording angel, saint, saved soul, seraph, seraphim, shaver,
   snookums, soul in glory, sugar, sweet, sweetheart, sweetie,
   sweetkins, sweets, tad, tot, wee tot



Easton's 1897 Bible Dictionary:

Cherub
   plural cherubim, the name of certain symbolical figures
   frequently mentioned in Scripture. They are first mentioned in
   connection with the expulsion of our first parents from Eden
   (Gen. 3:24). There is no intimation given of their shape or
   form. They are next mentioned when Moses was commanded to
   provide furniture for the tabernacle (Ex. 25:17-20; 26:1, 31).
   God promised to commune with Moses "from between the cherubim"
   (25:22). This expression was afterwards used to denote the
   Divine abode and presence (Num. 7:89; 1 Sam. 4:4; Isa. 37:16;
   Ps. 80:1; 99:1). In Ezekiel's vision (10:1-20) they appear as
   living creatures supporting the throne of God. From Ezekiel's
   description of them (1;10; 41:18, 19), they appear to have been
   compound figures, unlike any real object in nature; artificial
   images possessing the features and properties of several
   animals. Two cherubim were placed on the mercy-seat of the ark;
   two of colossal size overshadowed it in Solomon's temple.
   Ezekiel (1:4-14) speaks of four; and this number of "living
   creatures" is mentioned in Rev. 4:6. Those on the ark are called
   the "cherubim of glory" (Heb. 9:5), i.e., of the Shechinah, or
   cloud of glory, for on them the visible glory of God rested.
   They were placed one at each end of the mercy-seat, with wings
   stretched upward, and their faces "toward each other and toward
   the mercy-seat." They were anointed with holy oil, like the ark
   itself and the other sacred furniture.

     The cherubim were symbolical. They were intended to represent
   spiritual existences in immediate contact with Jehovah. Some
   have regarded them as symbolical of the chief ruling power by
   which God carries on his operations in providence (Ps. 18:10).
   Others interpret them as having reference to the redemption of
   men, and as symbolizing the great rulers or ministers of the
   church. Many other opinions have been held regarding them which
   need not be referred to here. On the whole, it seems to be most
   satisfactory to regard the interpretation of the symbol to be
   variable, as is the symbol itself.

     Their office was, (1) on the expulsion of our first parents
   from Eden, to prevent all access to the tree of life; and (2) to
   form the throne and chariot of Jehovah in his manifestation of
   himself on earth. He dwelleth between and sitteth on the
   cherubim (1 Sam. 4:4; Ps. 80:1; Ezek. 1:26, 28).