资料来源 : pyDict

或者,抑或;即,也就是说;否则,要不然

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Or \Or\, conj. [OE. or, outher, other, auther, either, or, AS.
   [=a]w?er, contr. from [=a]hw[ae]?er; [=a] aye + hw[ae]?er
   whether. See {Aye}, and {Whether}, and cf. {Either}.]
   A particle that marks an alternative; as, you may read or may
   write, -- that is, you may do one of the things at your
   pleasure, but not both. It corresponds to either. You may
   ride either to London or to Windsor. It often connects a
   series of words or propositions, presenting a choice of
   either; as, he may study law, or medicine, or divinity, or he
   may enter into trade.

         If man's convenience, health, Or safety interfere, his
         rights and claims Are paramount.         --Cowper.

   Note: Or may be used to join as alternatives terms expressing
         unlike things or ideas (as, is the orange sour or
         sweet?), or different terms expressing the same thing
         or idea; as, this is a sphere, or globe.

   Note: Or sometimes begins a sentence. In this case it
         expresses an alternative or subjoins a clause differing
         from the foregoing. ``Or what man is there of you, who,
         if his son shall ask him for a loaf, will give him a
         stone?'' --Matt. vii. 9 (Rev. Ver. ). Or for either is
         archaic or poetic.

               Maugre thine heed, thou must for indigence Or
               steal, or beg, or borrow thy dispence. --Chaucer.

Or \Or\, prep. & adv. [AS. ?r ere, before. [root]204. See {Ere},
   prep. & adv.]
   Ere; before; sooner than. [Obs.]

         But natheless, while I have time and space, Or that I
         forther in this tale pace.               --Chaucer.

   {Or ever}, {Or ere}. See under {Ever}, and {Ere}.

Or \Or\, n. [F., fr. L. aurum gold. Cf. {Aureate}.] (Her.)
   Yellow or gold color, -- represented in drawing or engraving
   by small dots.

资料来源 : WordNet®

OR
     n 1: a state in northwestern United States on the Pacific [syn: {Oregon},
           {Beaver State}]
     2: a room in a hospital equipped for the performance of
        surgical operations; "great care is taken to keep the
        operating rooms aseptic" [syn: {operating room}, {operating
        theater}, {operating theatre}, {surgery}]

资料来源 : Free On-Line Dictionary of Computing

OR
     
         The {Boolean} function which is true if any of its
        arguments are true.  Its {truth table} is:
     
         A | B | A OR B
         --+---+---------
         F | F |    F
         F | T |    T
         T | F |    T
         T | T |    T
     
        (1996-11-04)