The Collaborative International Dictionary of English v.0.48:

accompanied \accompanied\ adj.
   1. having companions or an escort

   Syn: accompanied (vs. un), attended
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Accompany \Ac*com"pa*ny\, v. t. [imp. & p. p. Accompanied; p.
   pr. & vb. n. Accompanying] [OF. aacompaignier, F.
   accompagner, to associate with, fr. OF. compaign, compain,
   companion. See Company.]
   1. To go with or attend as a companion or associate; to keep
      company with; to go along with; -- followed by with or by;
      as, he accompanied his speech with a bow.
      [1913 Webster]

            The Persian dames, . . .
            In sumptuous cars, accompanied his march. --Glover.
      [1913 Webster]

            They are never alone that are accompanied with noble
            thoughts.                             --Sir P.
                                                  Sidney.
      [1913 Webster]

            He was accompanied by two carts filled with wounded
            rebels.                               --Macaulay.
      [1913 Webster]

   2. To cohabit with. [Obs.] --Sir T. Herbert.
      [1913 Webster]

   Syn: To attend; escort; go with.

   Usage: To Accompany, Attend, Escort. We accompany those
          with whom we go as companions. The word imports an
          equality of station. We attend those whom we wait upon
          or follow. The word conveys an idea of subordination.
          We escort those whom we attend with a view to guard
          and protect. A gentleman accompanies a friend to some
          public place; he attends or escorts a lady.
          [1913 Webster]

WordNet (r) 3.0 (2006):

accompanied
    adj 1: having companions or an escort; "there were lone
           gentlemen and gentlemen accompanied by their wives" [ant:
           unaccompanied]
    2: playing or singing with instrumental or vocal accompaniment
       [syn: accompanied, attended] [ant: unaccompanied]