Definitions of Stoic:

• noun:   a member of the ancient Greek school of philosophy founded by Zeno

  Example: "A Stoic achieves happiness by submission to destiny"

• noun:   someone who is seemingly indifferent to emotions
• adjective:   pertaining to Stoicism or its followers
• adjective:   seeming unaffected by pleasure or pain; impassive

  Example: "Stoic courage"