Why the Greeks were never considered an empire, but the Romans were?

Greece in the Roman era describes the period of Greek history when Ancient Greece was dominated by the Roman Republic and the Roman Empire (27 BC – AD 1453), commonly referred to as the Byzantine Empire after about AD 395. The Roman era of Greek history began with the Corinthian defeat in the Battle of Corinth in 146 BC. However, before the Achaean War, the Roman Republic had been steadily gaining control of mainland Greece by defeating the Kingdom of Macedon in a series of conflicts known as the Macedonian Wars. The Fourth Macedonian War ended at the Battle of Pydna in 148 BC and defeat of the Macedonian royal pretender Andriscus.

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d.summerains, the last one

d. dr. francis collins