The Collaborative International Dictionary of English v.0.48:

paradox \par"a*dox\ (p[a^]r"[.a]*d[o^]ks), n.; pl. paradoxes
   (p[a^]r"[.a]*d[o^]ks*[e^]z). [F. paradoxe, L. paradoxum, fr.
   Gr. para`doxon; para` beside, beyond, contrary to + dokei^n
   to think, suppose, imagine. See Para-, and Dogma.]
   A tenet or proposition contrary to received opinion; an
   assertion or sentiment seemingly contradictory, or opposed to
   common sense; that which in appearance or terms is absurd,
   but yet may be true in fact.
   [1913 Webster]

         A gloss there is to color that paradox, and make it
         appear in show not to be altogether unreasonable.
                                                  --Hooker.
   [1913 Webster]

         This was sometime a paradox, but now the time gives it
         proof.                                   --Shak.
   [1913 Webster]

   Hydrostatic paradox. See under Hydrostatic.
      [1913 Webster]

WordNet (r) 3.0 (2006):

paradox
    n 1: (logic) a statement that contradicts itself; "`I always
         lie' is a paradox because if it is true it must be false"

Moby Thesaurus II by Grady Ward, 1.0:

57 Moby Thesaurus words for "paradox":
   Gordian knot, absurdity, ambiguity, ambivalence, antinomy,
   asymmetry, contradiction, crux, dilemma, disproportion,
   disproportionateness, enigma, equivocality, equivocation, heresy,
   heterodoxy, heterogeneity, hopelessness, impossibility, impossible,
   impossibleness, incoherence, incommensurability, incompatibility,
   inconceivability, incongruity, inconsistency, inconsonance, irony,
   irreconcilability, knot, knotty point, mystery, no chance, node,
   nodus, nonconformability, nonconformity, nonplus, oxymoron,
   perplexity, pons asinorum, poser, problem, puzzle, quandary,
   self-contradiction, teaser, the impossible, unconformability,
   unconformity, unimaginability, unorthodoxy, unthinkability,
   vexed question, what cannot be, what cannot happen



The Free On-line Dictionary of Computing (30 December 2018):

Paradox

    A relational database for Microsoft Windows,
   originally from Borland.

   Paradox 5 ran on Microsoft Windows [version?] and provided a
   graphical environment, a debugger, a data modelling tool,
   and many "ObjectPAL" commands.

   Paradox 7 ran under Windows 95 and Windows NT.

   (http://corel.com/paradox9/index.htm).

   [Update?]

   (1996-05-27)


The Free On-line Dictionary of Computing (30 December 2018):

paradox

    An apparently sound argument leading to a
   contradiction.

   Some famous examples are Russell's paradox and the liar
   paradox.  Most paradoxes stem from some kind of
   self-reference.

   Smarandache Linguistic Paradox
   (http://gallup.unm.edu/~smarandache/Paradox.htm).

   (1999-11-05)