Panathenaea

[ pan-ath-uh-nee-uh ]
/ ˌpæn æθ əˈni ə /

noun

a festival in honor of the goddess Athena, celebrated yearly in ancient Athens, with each fourth year reserved for greater pomp, marked by contests, as in athletics and music, and highlighted by a solemn procession to the Acropolis bearing a peplos embroidered for the goddess.
Also Pan·ath·e·nai·a [pan-ath-uh-ney-uh] /ˌpæn æθ əˈneɪ ə/.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for panathenaia

Panathenaea

/ (pæˌnæθɪˈniːə) /

noun

(in ancient Athens) a summer festival on the traditional birthday of Athena
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