academic costume


noun

the ceremonial garb of the students and faculty in schools, colleges, and universities, consisting of a flat cap (mortarboard), a long, wide-sleeved gown, and sometimes a hood, worn especially at commencement exercises.
Also called academic dress.
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British Dictionary definitions for academic dress

academic dress

noun

formal dress, usually comprising cap, gown, and hood, worn by university staff and students

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012