The Collaborative International Dictionary of English v.0.48:

attached \attached\ adj.
   1. fastened together. a picnic table with attached benches
      [WordNet 1.5]

   2. being joined in close association; -- of people or
      organizations.

   Syn: affiliated, connected
        [WordNet 1.5]

   3. fastened onto another object; -- of objects smaller than
      the main object.
      [WordNet 1.5]

   4. (Architecture) connected by a common wall or passageway;
      -- used of buildings. detached
      [WordNet 1.5]

   5. (Biology) permanently attached to a substrate; not free to
      move about. an attached oyster vagile

   Syn: sessile
        [WordNet 1.5]

   6. associated in an exclusive sexual relationship; --
      opposite of unattached.

   Note: Narrower terms include: affianced, bespoken,
         betrothed, engaged, pledged, promised(predicate);
         married. Also See: loving.

   Syn: committed.
        [WordNet 1.5]