The Collaborative International Dictionary of English v.0.48:

Plight \Plight\, v. t. [imp. & p. p. Plighted; p. pr. & vb. n.
   Plighting.] [AS. plihtan to expose to danger, pliht
   danger;cf. D. verplichten to oblige, engage, impose a duty,
   G. verpflichten, Sw. f["o]rplikta, Dan. forpligte. See
   Plight, n.]
   1. To pledge; to give as a pledge for the performance of some
      act; as, to plight faith, honor, word; -- never applied to
      property or goods. " To do them plighte their troth."
      --Piers Plowman.
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            He plighted his right hand
            Unto another love, and to another land. --Spenser.
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            Here my inviolable faith I plight.    --Dryden.
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   2. To promise; to engage; to betroth.
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            Before its setting hour, divide
            The bridegroom from the plighted bride. --Sir W.
                                                  Scott.
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