at long running

from The Collaborative International Dictionary of English v.0.48

Running \Run"ning\, n.
   The act of one who, or of that which runs; as, the running
   was slow.
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   2. That which runs or flows; the quantity of a liquid which
      flows in a certain time or during a certain operation; as,
      the first running of a still.
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   3. The discharge from an ulcer or other sore.
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   {At long running}, in the long run. [Obs.] --Jer. Taylor.
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