The Collaborative International Dictionary of English v.0.48:

Seat \Seat\, v. t. [imp. & p. p. Seated; p. pr. & vb. n.
   Seating.]
   1. To place on a seat; to cause to sit down; as, to seat
      one's self.
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            The guests were no sooner seated but they entered
            into a warm debate.                   --Arbuthnot.
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   2. To cause to occupy a post, site, situation, or the like;
      to station; to establish; to fix; to settle.
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            Thus high . . . is King Richard seated. --Shak.
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            They had seated themselves in New Guiana. --Sir W.
                                                  Raleigh.
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   3. To assign a seat to, or the seats of; to give a sitting
      to; as, to seat a church, or persons in a church.
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   4. To fix; to set firm.
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            From their foundations, loosening to and fro,
            They plucked the seated hills.        --Milton.
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   5. To settle; to plant with inhabitants; as to seat a
      country. [Obs.] --W. Stith.
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   6. To put a seat or bottom in; as, to seat a chair.
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WordNet (r) 3.0 (2006):

seated
    adj 1: (of persons) having the torso erect and legs bent with
           the body supported on the buttocks; "the seated Madonna";
           "the audience remained seated" [syn: seated, sitting]
           [ant: standing]

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "seated":
   assigned, deployed, embosomed, emplaced, ensconced, established,
   fixed, installed, located, placed, planted, positioned, posted,
   set, settled, situate, situated, spotted, stationed