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Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Seep \Seep\, or Sipe \Sipe\, v. i. [AS. s[imac]pan to distill.]
      To run or soak through fine pores and interstices; to ooze.
      [Scot. & U. S.]
      [1913 Webster]
            Water seeps up through the sidewalks.    --G. W. Cable.
      [1913 Webster] Seepage