The DICT Development Group

  Incumbrance \In*cum"brance\, n. [See Encumbrance.] [Written
     also encumbrance.]
     [1913 Webster]
     1. A burdensome and troublesome load; anything that impedes
        motion or action, or renders it difficult or laborious;
        clog; impediment; hindrance; check. --Cowper.
        [1913 Webster]
  
     2. (Law) A burden or charge upon property; a claim or lien
        upon an estate, which may diminish its value.
        [1913 Webster]

  incumbrance
      n 1: a charge against property (as a lien or mortgage) [syn:
           encumbrance, incumbrance]
      2: an onerous or difficult concern; "the burden of
         responsibility"; "that's a load off my mind" [syn: burden,
         load, encumbrance, incumbrance, onus]
      3: any obstruction that impedes or is burdensome [syn:
         hindrance, hinderance, hitch, preventive,
         preventative, encumbrance, incumbrance, interference]