Learn how to say Iranians correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word Iranian:
a native, citizen, or inhabitant of Iran
a branch of the Indo-European family of languages, divided into West Iranian (including Old Persian, Pahlavi, modern Persian, Kurdish, Baluchi, and Tajik) and East Iranian (including Avestan, Sogdian, Pashto, and Ossetic)
Also: Persian, Farsi. the modern Persian language
relating to, denoting, or characteristic of Iran, its inhabitants, or their language; Persian
belonging to or relating to the Iranian branch of Indo-European