(historical, archaic) The former term referring to Iran in the West. / Persia proper (Persis), the land of the ancient Persians, corresponding to modern-day Fars province in southwestern Iran.

(uncountable) The Persian language, or a family of languages spoken primarily in Iran, Afghanistan, Tajikistan, and Uzbekistan. / (countable) A person from Persia.

Of, from, or pertaining to Persia. / Of or pertaining to the Persian people. / Of or pertaining to the Persian language.

Of or pertaining to Persius (Roman writer)

The Tajik language.

(historical) The empire ruled by the Achaemenid dynasty 550–330 B.C.E.. / (historical) The empire ruled by the Sassanid dynasty 224–651 C.E..

The Persian Gulf, a gulf between Iran (“Persia”) and the Arabian Peninsula.

plural of Persian

The ancestor language of Middle Persian, and via it of New Persian language. Attested in Old Persian cuneiform, in the period 525 B.C.E. - 300 B.C.E..

The ancestor of New Persian spoken from around 300 BC till about 800 AD, evolving from Old Persian.