The Collaborative International Dictionary of English v.0.48:

Fullness \Full"ness\, n.
   The state of being full, or of abounding; abundance;
   completeness. [Written also fulness.]
   [1913 Webster]

         "In thy presence is fullness of joy."    --Ps. xvi. 11.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Fulness \Ful"ness\, n.
   See Fullness.
   [1913 Webster]

Easton's 1897 Bible Dictionary:

Fulness
   (1.) Of time (Gal. 4:4), the time appointed by God, and foretold
   by the prophets, when Messiah should appear. (2.) Of Christ
   (John 1:16), the superabundance of grace with which he was
   filled. (3.) Of the Godhead bodily dwelling in Christ (Col.
   2:9), i.e., the whole nature and attributes of God are in
   Christ. (4.) Eph. 1:23, the church as the fulness of Christ,
   i.e., the church makes Christ a complete and perfect head.