Pronunciation: (klā'vus, klä'-),[key] —n., —pl.-viPronunciation: (-vī, -vē).[key] 1. Psychiatry.an intense headache in which the pain is likened to one that would be produced by a sharp object driven into the skull.
2. (in ancient Rome) a vertical stripe or band of purple worn on the tunic by senators and equites.