The Collaborative International Dictionary of English v.0.48:

Belong \Be*long"\, v. i. [imp. & p. p. Belonged; p. pr. & vb.
   n. Belonging.] [OE. belongen (akin to D. belangen to
   concern, G. belangen to attain to, to concern); pref. be- +
   longen to desire. See Long, v. i.]

   Note: [Usually construed with to.]
   1. To be the property of; as, Jamaica belongs to Great
      Britain.
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   2. To be a part of, or connected with; to be appendant or
      related; to owe allegiance or service.
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            A desert place belonging to . . . Bethsaids. --Luke
                                                  ix. 10.
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            The mighty men which belonged to David. --1 Kings i.
                                                  8.
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   3. To be the concern or proper business or function of; to
      appertain to. "Do not interpretations belong to God ?"
      --Gen. xl. 8.
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   4. To be suitable for; to be due to.
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            Strong meat belongeth to them that are of full age.
                                                  --Heb. v. 14.
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            No blame belongs to thee.             --Shak.
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   5. To be native to, or an inhabitant of; esp. to have a legal
      residence, settlement, or inhabitancy, whether by birth or
      operation of law, so as to be entitled to maintenance by
      the parish or town.
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            Bastards also are settled in the parishes to which
            the mothers belong.                   --Blackstone.
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The Collaborative International Dictionary of English v.0.48:

Belonging \Be*long"ing\, n. [Commonly in the pl.]
   1. That which belongs to one; that which pertains to one;
      hence, goods or effects. "Thyself and thy belongings."
      --Shak.
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   2. That which is connected with a principal or greater thing;
      an appendage; an appurtenance.
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   3. Family; relations; household. [Colloq.]
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            Few persons of her ladyship's belongings stopped,
            before they did her bidding, to ask her reasons.
                                                  --Thackeray.
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WordNet (r) 3.0 (2006):

belonging
    n 1: happiness felt in a secure relationship; "with his
         classmates he felt a sense of belonging"