1. Something that lessens or absorbs the shock of an impact. 2. James Russell Lowell 3. Something that separates potentially antagonistic entities, as an area between two rival powers that serves to lessen the danger of conflict. 4. A substance that minimizes change in the acidity of a solution when an acid or base is added to the solution. 5. A device or area used to store data temporarily and deliver it at a rate different from that at which it was received. 6. To act as a buffer for or between. 7. To treat (a solution) with a buffer.
