1. Present or use over, with no or few changes
   "The politician rehashed his old campaign promises"
    
2. Go back over
   "rehash arguments";
   - retrograde, hash over [N. Amer]

1. Old material that is slightly reworked and used again
   "merely a dull rehash of his first novel"

Derived forms: rehashes, rehashing, rehashed

Type of: material, recap, recapitulate, recycle, reprocess, reuse

Encyclopedia: Rehash