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See more synonyms for underrun on Thesaurus.com
verb (used with object), un·der·ran, un·der·run, un·der·run·ning.
  1. to run, pass, or go under.
  2. Nautical. to pass beneath (a stretched rope, net, etc.) in a boat or the like for the purpose of inspection or repairs.
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  1. something that runs or passes underneath, as a current.
  2. an instance of costing or spending less than estimated.
  3. a production run of a manufactured or printed item below the quantity ordered.
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Origin of underrun

First recorded in 1540–50; under- + run
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for underrunning

Historical Examples

  • Later Van Depoele invented an underrunning trolley and pole, taking out the original patents.

    Every-day Science: Volume VII. The Conquest of Time and Space

    Henry Smith Williams

  • In place of the underrunning trolley and pole, however, the current was taken from the overhead wire by means of a flexible cable.