WordWeb Online

1. More than is needed, desired, or required
   "yet another book on heraldry might be thought redundant"; "skills made redundant by technological advance";
   - excess, extra, spare, supererogatory, superfluous, supernumerary, surplus
    
2. Repetition of same sense in different words
   "at the risk of being redundant I return to my original proposition";
   - pleonastic, tautologic, tautological
    
3. [Brit, Cdn] Laid off work because the job position was no longer needed
   - riffed [US]
    
4. (computing) duplicating the function of another component of a system, providing back-up in case of failure

See also: prolix, unnecessary, unneeded

Encyclopedia: Redundant