Definition of "Tajik" :

noun: the Iranian language of the Tajik that is closely related to Farsi; spoken in Iran and Tajikistan

noun: an ethnic group (mostly Moslem) living in Tajikistan and neighboring areas of Uzbekistan and Afghanistan and China

noun: a landlocked mountainous republic in southeast central Asia to the north of Afghanistan; formerly an Asian soviet

noun: a native or inhabitant of Tajikistan and neighboring areas of Uzbekistan and Afghanistan and China