The Collaborative International Dictionary of English v.0.48:

Priority \Pri*or"i*ty\, n. [Cf. F. priorit['e]. See Prior, a.]
   1. The quality or state of being prior or antecedent in time,
      or of preceding something else; as, priority of
      application.
      [1913 Webster]

   2. Precedence; superior rank. --Shak.
      [1913 Webster]

   Priority of debts, a superior claim to payment, or a claim
      to payment before others.
      [1913 Webster]

   Syn: Antecedence; precedence; pre["e]minence.
        [1913 Webster]

Moby Thesaurus II by Grady Ward, 1.0:

125 Moby Thesaurus words for "priority":
   accent, accomplishment, antecedence, antecedency, anteposition,
   anteriority, arrangement, ascendancy, authority, bold front,
   brave face, brave front, concern, concernment, consequence,
   consequentiality, consideration, deanship, display, dominion,
   eminence, emphasis, excellence, facade, face, facet, facia, favor,
   fore, forefront, foregoing, foreground, forehand, foreland,
   forepart, forequarter, foreside, foreword, front, front elevation,
   front man, front matter, front page, front position, front view,
   frontage, frontal, frontier, frontispiece, greatness, head,
   heading, high order, high rank, immediacy, import, importance,
   incomparability, influence, influentialness, inimitability,
   interest, lap, le pas, lead, leading, majority, mark, materiality,
   merit, moment, note, obverse, one-upmanship, order, ordering,
   paramountcy, precedence, precedency, preceding, precession,
   precursor, predominance, predomination, preeminence, preface,
   preference, prefix, prefixation, prelude, preponderance,
   prepotence, prepotency, prerogative, pressure, prestige, primacy,
   privilege, prominence, proscenium, prothesis, rank, right,
   right-of-way, self-importance, seniority, significance, skill,
   stature, stress, success, superiority, supremacy, the lead,
   top priority, transcendence, transcendency, urgency, value, van,
   virtuosity, weight, weightiness, window dressing, worth