Definition of "Iran"
Iran
proper noun
(literary, technical) regions inhabited by the Iranian peoples.
Quotations
"Kavi means a king, but it is particularly used of the kings belonging to the second and most celebrated of the two mythical dynasties of Iran." / "One certain fact is the occurrence of geographical names [Bactria, Sogdiana, etc] in Vendidad I, which are obviously intended to describe the earliest homes of the Iranian races whose lore was the Avesta."
1882, James Darmesteter, The Zend-Avesta, volume 1 (SBE, volume 31), Oxford UP, page 7, xxviii
"Iran. in early times, the name applied to the great Asiatic plateau which comprised the entire region from the Caucasus, the Caspian Sea, and Russian Turkestan on the north to the Tigris, the Persian Gulf, and the Arabian Sea on the west and south, and extending to the Indus on the east, likewise comprising the modern Afghanistan and the territory to the north of it as far as the Jaxartes River."
1909, “Iran”, in John Huston Finley, editor, Nelson's Perpetual Loose-leaf Encyclopaedia, volume 6, page 479
"[W]e may surmise that there was a strong sense of Iranian unity lending solidarity to the eastern half of the empire. It is only in the generations after Alexander, in Eudemus and in Eratosthenes (ap. Strabo), that we find mention of the concept of a greater nation of Iran (Arianē) stretching from the Zagros to the Indus; but the sense of unity must have been there, for Herodotus tells us that the Medes were formerly called Arioi, and Darius I (followed by Xerxes) in his inscriptions proclaims himself an Iranian (Ariya) by race - he speaks of himself in ascending order as an Achaemenid, a Persian and an Iranian (Naqsh-i Rustam)."
1985, J. M. Cooke, “The Rise of the Achaemenids”, in Cambridge Historiy of Iran, volume 2, page 290