The Collaborative International Dictionary of English v.0.48:

Share \Share\, v. t. [imp. & p. p. Shared; p. pr. & vb. n.
   Sharing.]
   1. To part among two or more; to distribute in portions; to
      divide.
      [1913 Webster]

            Suppose I share my fortune equally between my
            children and a stranger.              --Swift.
      [1913 Webster]

   2. To partake of, use, or experience, with others; to have a
      portion of; to take and possess in common; as, to share a
      shelter with another.
      [1913 Webster]

            While avarice and rapine share the land. --Milton.
      [1913 Webster]

   3. To cut; to shear; to cleave; to divide. [Obs.]
      [1913 Webster]

            The shared visage hangs on equal sides. --Dryden.
      [1913 Webster]

WordNet (r) 3.0 (2006):

sharing
    adj 1: unselfishly willing to share with others; "a warm and
           sharing friend"
    n 1: using or enjoying something jointly with others
    2: having in common; "the sharing of electrons creates
       molecules"
    3: sharing thoughts and feelings [syn: communion, sharing]
    4: a distribution in shares [syn: sharing, share-out]

Moby Thesaurus II by Grady Ward, 1.0:

128 Moby Thesaurus words for "sharing":
   accessory, accord, accordance, affiliation, affinity, agape,
   agreement, amity, announcement, apportionment, association,
   bonds of harmony, brotherly love, budgeting, caring, caritas,
   cement of friendship, charity, chord, cochairmanship, communion,
   community, community of interests, companionship, company,
   compatibility, complicity, concern, concord, concordance,
   condominium, congeniality, consociation, contribution, conveyance,
   cooperation, copartnership, copartnery, correspondence, cotenancy,
   cutting, cutting the pie, disclosure, dividing, division, divvy,
   echo, empathy, engaged, engagement, esprit, esprit de corps,
   feeling of identity, fellow feeling, fellowship, fraternity,
   fraternization, frictionlessness, giving, good vibes,
   good vibrations, happy family, harmony, having a part,
   identification, identity, impartation, imparting, impartment,
   implicated, involved, involvement, joint chairmanship,
   joint control, joint ownership, joint tenancy, kinship,
   like-mindedness, love, membership, mutuality, notification,
   oneness, parceling, partaking, participant, participating,
   participation, participative, participatory, partition,
   partitioning, partnership, pathos, peace, portioning, publication,
   rapport, rapprochement, rationing, reciprocity, relating,
   repartition, response, responsiveness, sharing out, slicing,
   society, solidarity, splitting, suffrage, sympathetic chord,
   sympathetic response, sympathy, symphony, team spirit, telling,
   transfer, transference, transmission, transmittal, understanding,
   union, unison, unity, vibes, vibrations, voting