1. Relating to or characteristic of the classical Greek civilization
   "Greece was poised on its most triumphant period, the Hellenistic age";
   - Hellenic, Hellenistical [rare]
    
2. Relating to or characteristic of the Greek civilization and culture between the death of Alexander the Great and the rise of Roman dominance;"The Hellenistic age saw the spread of Greek culture throughout the Mediterranean"
   - Hellenistical

Encyclopedia: Hellenistic