Source : Webster's Revised Unabridged Dictionary (1913)

Abrasive \Ab*ra"sive\, a.
   Producing abrasion. --Ure.

Source : WordNet®

abrasive
     adj 1: causing abrasion [syn: {scratchy}]
     2: sharply disagreeable; rigorous; "the harsh facts of court
        delays"; "an abrasive character" [syn: {harsh}]

abrasive
     n : a substance that abrades or wears down [syn: {abradant}, {abrasive
         material}]