Source : Webster's Revised Unabridged Dictionary (1913)

Superabundant \Su`per*a*bun"dant\, a. [L. superabundans, p. pr.
   of superabundare. See {Superabound}.]
   Abounding to excess; being more than is sufficient;
   redundant; as, superabundant zeal. -- {Su`per*a*bun"dant*ly},
   adv.

Source : WordNet®

superabundant
     adj : most excessively abundant