Definition of "ox"

ox¹

/ˈɑks/

noun
plural oxen or (nonstandard) oxes
1. An adult castrated male of cattle (B. taurus), especially when used as a beast of burden.
2. Any bovine animal (genus Bos). A neat, a beef.
  Quotations
  Here the same four kinds are mentioned ... These are sheep, goats, camels and oxen.
  1934, commentary on the Qur'an (Sura 39 verse 6) by Abdullah Yusuf Ali

ox²

/ˈɑks/

noun
uncountable
1. Abbreviation of oxygen.
  Quotations
  I'm super excited to be on the summit of K2! No Ox! (coughs) It was hard.
  2020, Carla Perez, 42:40 from the start, in Breathtaking: K2 - The World's Most Dangerous Mountain | Eddie Bauer‎, YouTube, Eddie Bauer, archived from the original on 2020-05-22