Ictus/ˈɪktəs/ Definition 1 of 2Pro Tip 1/3Serious Condition Use 'ictus' to describe severe health events that require immediate attention. He experienced an ictus and needed urgent medical care. Pro Tip 2/3Medical Jargon 'Ictus' is technical; use it in medical or formal contexts, not casual conversation. The medical report stated the cause of collapse as an ictus. Pro Tip 3/3Emergency Indicator 'Ictus' indicates a critical situation that often leads to action, like hospitalization. Paramedics confirmed the symptoms were due to an ictus.