stoicism UK /ˈstəʊɪsɪzəm/US /ˈstoʊɪsɪzəm/ noun2 •A real or pretended indifference to pleasure or pain; insensibility; impassiveness. •A school of philosophy popularized during the Roman Empire that emphasized reason as a means of understanding the natural state of things, or logos, and as a means of freeing oneself from emotional distress. formsstoicisms