WordReference Random House Unabridged Dictionary of American English © 2020
Hi•lar•i•us  (hi lârē əs),USA pronunciation n. 
  1. BiographicalSaint, died a.d. 468, pope 461–468.
Also,  Hil•a•rus  (hi lârē əs),USA pronunciation  Hilary. 
'Hilarius' also found in these entries:
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