buffer in WordNet English dictionary

1. an implement consisting of soft material mounted on a block; used for polishing (as in manicuring)
   buff  buffer 
   
2. a cushion-like device that reduces shock due to an impact
   buffer  fender 
   
3. a power tool used to buff surfaces
   buffer  polisher 
   
4. an inclined metal frame at the front of a locomotive to clear the track
   fender  buffer  cowcatcher  pilot 
   
5. (computer science) a part of RAM used for temporary storage of data that is waiting to be sent to a device; used to compensate for differences in the rate of flow of data between components of a computer system
   buffer  buffer storage  buffer store 
   
6. a neutral zone between two rival powers that is created in order to diminish the danger of conflict
   buffer zone  buffer 
   
7. (chemistry) an ionic compound that resists changes in its pH
   buffer 
   

1. add a buffer (a solution)
   "buffered saline solution for the eyes"
   buffer 
   
2. protect from impact
   "cushion the blow"
   cushion  buffer  soften