The Collaborative International Dictionary of English v.0.48:

Stoic \Sto"ic\, n. [L. stoicus, Gr. ?, fr. ?, adj., literally,
   of or pertaining to a colonnade, from ? a roofed colonnade, a
   porch, especially, a porch in Athens where Zeno and his
   successors taught.]
   1. A disciple of the philosopher Zeno; one of a Greek sect
      which held that men should be free from passion, unmoved
      by joy or grief, and should submit without complaint to
      unavoidable necessity, by which all things are governed.
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   2. Hence, a person not easily excited; an apathetic person;
      one who is apparently or professedly indifferent to
      pleasure or pain.
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            A Stoic of the woods, a man without a tear.
                                                  --Campbell.
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   School of Stoics. See The Porch, under Porch.
      [1913 Webster] Stoic