The Collaborative International Dictionary of English v.0.48:

Corrosive \Cor*ro"sive\, n.
   1. That which has the quality of eating or wearing away
      gradually.
      [1913 Webster]

            [Corrosives] act either directly, by chemically
            destroying the part, or indirectly by causing
            inflammation and gangrene.            --Dunglison.
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   2. That which has the power of fretting or irritating.
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            Such speeches . . . are grievous corrosives.
                                                  --Hooker.
      -- Cor*ro"sive*ly, adv. -- Cor*ro"sive*ness, n.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Corrosive \Cor*ro"sive\ (k?r-r?"s?v), a. [Cf. F. corrosif.]
   1. Eating away; having the power of gradually wearing,
      changing, or destroying the texture or substance of a
      body; as, the corrosive action of an acid. "Corrosive
      liquors." --Grew. "Corrosive famine." --Thomson.
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   2. Having the quality of fretting or vexing.
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            Care is no cure, but corrosive.       --Shak.
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   Corrosive sublimate (Chem.), mercuric chloride, HgCl2; so
      called because obtained by sublimation, and because of its
      harsh irritating action on the body tissue. Usually it is
      in the form of a heavy, transparent, crystalline
      substance, easily soluble, and of an acrid, burning taste.
      It is a virulent poison, a powerful antiseptic, and an
      excellent antisyphilitic; called also mercuric
      bichloride. It is to be carefully distinguished from
      calomel, the mild chloride of mercury.
      [1913 Webster]

WordNet (r) 3.0 (2006):

corrosive
    adj 1: of a substance, especially a strong acid; capable of
           destroying or eating away by chemical action [syn:
           caustic, corrosive, erosive, vitriolic,
           mordant]
    2: spitefully sarcastic; "corrosive cristism"
    n 1: a substance having the tendency to cause corrosion (such a
         strong acids or alkali)