DuckCorp Dico

Found one definition

1.                 From WordNet (r) 3.0 (2006):
                   
   
   
                   
                     
   tacking
       n 1: a loose temporary sewing stitch to hold layers of fabric
            together [syn: baste, basting, basting stitch,
            tacking]
       2: (nautical) the act of changing tack [syn: tack, tacking]