The Collaborative International Dictionary of English v.0.48:

Curtail \Cur*tail"\ (k[u^]r*t[=a]l"), v. t. [imp. & p. p.
   Curtailed (-t[=a]ld"); p. pr. & vb. n. Curtailing.] [See
   Curtal.]
   To cut off the end or tail, or any part, of; to shorten; to
   abridge; to diminish; to reduce.
   [1913 Webster]

         I, that am curtailed of this fair proportion. --Shak.
   [1913 Webster]

         Our incomes have been curtailed; his salary has been
         doubled.                                 --Macaulay.
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