The Collaborative International Dictionary of English v.0.48:

Moor \Moor\ (m[=oo]r), v. t. [imp. & p. p. Moored (m[=oo]rd);
   p. pr. & vb. n. Mooring.] [Prob. fr. D. marren to tie,
   fasten, or moor a ship. See Mar.]
   1. (Naut.) To fix or secure, as a vessel, in a particular
      place by casting anchor, or by fastening with cables or
      chains; as, the vessel was moored in the stream; they
      moored the boat to the wharf.
      [1913 Webster]

   2. Fig.: To secure, or fix firmly. --Brougham.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Mooring \Moor"ing\, n.
   1. The act of confining a ship to a particular place, by
      means of anchors or fastenings.
      [1913 Webster]

   2. That which serves to confine a ship to a place, as
      anchors, cables, bridles, etc.
      [1913 Webster]

   3. pl. The place or condition of a ship thus confined.
      [1913 Webster]

            And the tossed bark in moorings swings. --Moore.
      [1913 Webster]

   Mooring block (Naut.), a heavy block of cast iron sometimes
      used as an anchor for mooring vessels.
      [1913 Webster]

WordNet (r) 3.0 (2006):

mooring
    n 1: a place where a craft can be made fast [syn: mooring,
         moorage, berth, slip]
    2: (nautical) a line that holds an object (especially a boat) in
       place [syn: mooring, mooring line]

Moby Thesaurus II by Grady Ward, 1.0:

62 Moby Thesaurus words for "mooring":
   anchor, anchorage, anchorage ground, basin, berth, breakwater,
   bulkhead, colonization, debarkation, disembarkation, disembarkment,
   dock, dockage, docking, dockyard, dropping anchor, dry dock,
   embankment, establishment, fixation, foundation, going ashore,
   groin, harbor, harborage, haven, hook, inauguration, initiation,
   installation, installment, investiture, jetty, jutty, landfall,
   landing, landing place, landing stage, lodgment, marina, mole,
   mooring buoy, moorings, mudhook, peopling, pier, plantation,
   population, port, protected anchorage, quay, road, roads,
   roadstead, seaport, seawall, settlement, settling, shipyard, slip,
   tying up, wharf



Bouvier's Law Dictionary, Revised 6th Ed (1856):

MOORING, mar. law. The act of arriving of a ship or vessel at a particular
port, and there being anchored or otherwise fastened to the shore.
     2. Policies of insurance frequently contain a provision that the ship
is insured from one place to another, "and till there moored twenty-four
hours in good safety." As to what shall be a sufficient mooring, see 1
Marsh. Ins. 262; Park. on Ins. 35; 2 Str. 1251; 3. T. R. 362.