Source : Webster's Revised Unabridged Dictionary (1913)

Blotter \Blot"ter\ (bl[o^]t"t[~e]r), n.
   1. One who, or that which, blots; esp. a device for absorbing
      superfluous ink.

Source : WordNet®

blotter
     n 1: absorbent paper used to dry ink [syn: {blotting paper}]
     2: the daily written record of events (as arrests) in a police
        station [syn: {day book}, {police blotter}, {rap sheet}, {charge
        sheet}]