The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]