The Collaborative International Dictionary of English v.0.48:

Chain \Chain\, v. t. [imp. p. p. Chained (ch[=a]nd); p. pr. &
   vb. n. Chaining.]
   1. To fasten, bind, or connect with a chain; to fasten or
      bind securely, as with a chain; as, to chain a bulldog.
      [1913 Webster]

            Chained behind the hostile car.       --Prior.
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   2. To keep in slavery; to enslave.
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            And which more blest? who chained his country, say
            Or he whose virtue sighed to lose a day? --Pope.
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   3. To unite closely and strongly.
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            And in this vow do chain my soul to thine. --Shak.
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   4. (Surveying) To measure with the chain.
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   5. To protect by drawing a chain across, as a harbor.
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The Collaborative International Dictionary of English v.0.48:

chained \chained\ adj.
   bound with chains; as, prisoners chained together to prevent
   escape.

   Syn: enchained, in chains(predicate).
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

chained
    adj 1: bound with chains; "enchained demons strained in anger to
           gnaw on his bones"; "prisoners in chains" [syn:
           chained, enchained]