DuckCorp Dico

Found one definition

1.                 From The Collaborative International Dictionary of English v.0.48:
                   
   
   
                   
                     
   Sock in \Sock in\, v. t.
      to cause (an airport) to cease functioning, by severe weather
      conditions, such as fog or a snowstorm. Used often in the
      passive; the airport was socked in for two days by a
      blizzard.
      [PJC]