WordReference Random House Unabridged Dictionary of American English © 2025
The•o•do•sian
(thē′ə dō′shən, -shē ən),USA pronunciation adj.
- Ancient History, World Historyof or pertaining to Theodosius I, who made Christianity the official state religion of the Roman Empire.
- Ancient History, World Historyof or pertaining to Theodosius II, who issued the earliest collection of the imperial laws (Theodo′sian Code′.)
- Theodosi(us) + -an 1755–65