The Collaborative International Dictionary of English v.0.48:

Erode \E*rode"\, v. t. [imp. & p. p. Eroded; p. pr. & vb. n.
   Eroding.] [L. erodere, erosum; e out + rodere to gnaw. See
   Rodent.]
   1. To eat into or away; to corrode; as, canker erodes the
      flesh. "The blood . . . erodes the vessels." --Wiseman.
      [1913 Webster]

            The smaller charge is more apt to . . . erode the
            gun.                                  --Am. Cyc.
      [1913 Webster]

   2. (Geol. & Phys. Geog.)
      (a) To wear away; as, streams and glaciers erode the land.
      (b) To produce by erosion, or wearing away; as, glaciers
          erode U-shaped valleys.
          [Webster 1913 Suppl.]

   3. to reduce or lessen as if by eroding; as, a politician's
      base of support is eroded by evidence of corruption; the
      buying power of the dollar is eroded by inflation. [fig.]
      [PJC]

The Collaborative International Dictionary of English v.0.48:

Eroded \E*rod"ed\, p. p. & a.
   1. Eaten away; gnawed; irregular, as if eaten or worn away.
      [1913 Webster]

   2. (Bot.) Having the edge worn away so as to be jagged or
      irregularly toothed.
      [1913 Webster]

WordNet (r) 3.0 (2006):

eroded
    adj 1: worn away as by water or ice or wind [syn: eroded,
           scoured]

Moby Thesaurus II by Grady Ward, 1.0:

72 Moby Thesaurus words for "eroded":
   abated, ablated, attenuated, bated, belittled, blanched, bleached,
   burnt up, by the board, consumed, contracted, corroded, curtailed,
   decreased, deflated, depleted, diminished, dissipated, drained,
   dropped, eaten, eaten up, effete, exhausted, expended, faded,
   fallen, finished, forfeit, forfeited, gone, impoverished,
   irretrievable, less, lesser, long-lost, lost, lost to, lower,
   lowered, miniaturized, out the window, reduced, retrenched,
   rust-cankered, rust-eaten, rust-worn, rusty, scaled-down, shorn,
   shorter, shrunk, shrunken, smaller, spent, squandered, used,
   used up, washed-out, wasted, watered-down, weakened,
   weather-battered, weather-beaten, weather-bitten, weather-eaten,
   weather-wasted, weathered, weatherworn, worn, worn away,
   worn-out