The Collaborative International Dictionary of English v.0.48:

Fiscal \Fis"cal\ (f[i^]s"kal), a. [F. fiscal, L. fiscalis, fr.
   fiscus. See Fisc.]
   Pertaining to the public treasury or revenue.
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         The fiscal arrangements of government.   --A. Hamilton.
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The Collaborative International Dictionary of English v.0.48:

Fiscal \Fis"cal\, n.
   1. The income of a prince or a state; revenue; exchequer.
      [Obs.] --Bacon.
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   2. A treasurer. --H. Swinburne.
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   3. A public officer in Scotland who prosecutes in petty
      criminal cases; -- called also procurator fiscal.
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   4. The solicitor in Spain and Portugal; the attorney-general.
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WordNet (r) 3.0 (2006):

fiscal
    adj 1: involving financial matters; "fiscal responsibility"
           [syn: fiscal, financial] [ant: nonfinancial]

Bouvier's Law Dictionary, Revised 6th Ed (1856):

FISCAL. Belonging to the fisc, or public treasury.