From WordNet (r) 3.0 (2006):
buffer
n 1: (chemistry) an ionic compound that resists changes in its
pH
2: a neutral zone between two rival powers that is created in
order to diminish the danger of conflict [syn: buffer zone,
buffer]
3: an inclined metal frame at the front of a locomotive to clear
the track [syn: fender, buffer, cowcatcher, pilot]
4: (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 [syn: buffer,
buffer storage, buffer store]
5: a power tool used to buff surfaces [syn: buffer,
polisher]
6: a cushion-like device that reduces shock due to an impact
[syn: buffer, fender]
7: an implement consisting of soft material mounted on a block;
used for polishing (as in manicuring) [syn: buff, buffer]
v 1: add a buffer (a solution); "buffered saline solution for
the eyes"
2: protect from impact; "cushion the blow" [syn: cushion,
buffer, soften]