Source : Webster's Revised Unabridged Dictionary (1913)

Stoicism \Sto"i*cism\, n. [Cf. F. sto["i]cisme.]
   1. The opinions and maxims of the Stoics.

   2. A real or pretended indifference to pleasure or pain;
      insensibility; impassiveness.

Source : WordNet®

stoicism
     n 1: an indifference to pleasure or pain [syn: {stolidity}, {stolidness}]
     2: (philosophy) the philosophical system of the Stoics
        following the teachings of the ancient Greek philosopher
        Zeno