Meaning of O tempora! O mores!*

O tem•po•ra! O mo•res!

Pronunciation: (ō tem'pō-rä" ō mō'rās Eng. ō tem'p&schwar-&schwa ō môr'ēz, mōr'-), [key]
— Latin. Latin.
  1. O times! O customs!
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.