(Stoic) a member of an ancient Greek or Roman school of philosophy, founded at Athens by Zeno of Citium, equating happiness with knowledge and holding that wisdom consists in self-mastery, submission to natural law, and indifference to pain, pleasure, and the caprices of fortune
a person who bears pain, hardship, and sorrow without showing their feelings or complaining
[via Latin from Greek stōïkos of the portico, from Stoa Poikilē the Painted Portico, portico at Athens where Zeno taught]