Source : Webster's Revised Unabridged Dictionary (1913)

Abrade \Ab*rade"\, v. t. [imp. & p. p. {Abraded}; p. pr. & vb.
   n. {Abrading}.] [L. abradere, abrasum, to scrape off; ab +
   radere to scrape. See {Rase}, {Raze}.]
   To rub or wear off; to waste or wear away by friction; as, to
   abrade rocks. --Lyell.

Abrade \A*brade"\, v. t.
   Same as {Abraid}. [Obs.]

Source : WordNet®

abrade
     v 1: wear away [syn: {corrade}, {abrase}, {rub down}, {rub off}]
     2: rub hard or scrub; "scour the counter tops" [syn: {scour}]
     3: strike against an object; "She stubbed her one's toe in the
        dark and now it's broken" [syn: {stub}, {scrape}, {skin}]