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| 1. | Also called Octavian (before 27 b.c.) (Gaius Julius Caesar Octavianus; Augustus Caesar ), 63 b.c.–a.d. 14, first Roman emperor 27 b.c.–a.d. 14: reformer, patron of arts and literature; heir and successor to Julius Caesar. |
| 2. | a title of office given to rulers of the Roman Republic after Octavianus. |
| 3. | a male given name. |
(Octavian ) died a.d. 964, Italian ecclesiastic: pope 955–964. |
Oc·ta·vi·an (ŏk-tā'vē-ən) See Augustus. |