capias UK /ˈkapɪəs/US /ˈkeɪ.pi.əs/ noun1 •An arrest warrant; a writ commanding officers to take a specified person or persons into custody.All which when Cupid heard, he by and by / In great displeasure wild a Capias / Should issue forth t'attach that scornefull lasse. — 1596 formscapiases