Explain what is meant by the Hellenistic Age.

The Hellenistic Age is a historical period in the Mediterranean, Egypt, and South Asia that flourished after the death of Alexander the Great in 332 BC.  Due to the conquests of Alexander of Macedonia, Greek culture was spread throughout the areas touched by his conquests.  These areas include Egypt, the Persian Empire, the whole of Greece, and parts of the Indus River Valley.  The period is marked by an explosion of learning and art and the blending of the various cultures that Alexander conquered.  The end of the Hellenistic era is considered to be 31 BC when Rome claimed the last of the lands of Alexander.  The period was also marked by political divisions within the lands that Alexander conquered.  His empires was divided into five kingdoms, which often time waged war with one another.  
https://www.ancient.eu/Hellenistic_Period/