The Collaborative International Dictionary of English v.0.48:

Circumstanced \Cir"cum*stanced\ (s[~e]r"k[u^]m*st[a^]nst), p. a.
   1. Placed in a particular position or condition; situated.
      [1913 Webster]

            The proposition is, that two bodies so circumstanced
            will balance each other.              --Whewell.
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   2. Governed by events or circumstances. [Poetic & R.] "I must
      be circumstanced." --Shak.
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