Awadhi (Devanagari: अवधी), Baiswari Or kosali, is an Eastern Hindi language, a dialect of the Hindi dialect continuum. It is spoken chiefly in the Awadh (Oudh) region of Uttar Pradesh and Nepal although its speakers are also found in Madhya Pradesh, Bihar and Delhi. A mixture of Awadhi, Brij Bhasha and Bundeli is also spoken in the Vatsa country (Lower Doab) south of Awadh region which includes Kanpur and Allahabad. It is also spoken in most of the Caribbean countries where the people of Uttar Pradesh were taken as indentured workers by the British India government. According to the 2001 census, it ranks 29th in the List of languages by number of native speakers in the world.
Awadhi is also known by alternate names of Abadhi, Abadi, Abohi, Ambodhi, Avadhi, Baiswari, Lakhanawi, Kojali, Kosali and Dehati.
Awadhi is mainly spoken in the major part of Uttar Pradesh or Central Uttar Pradesh, Uttarakhand and Bihar, the adjoining Madhesh area of Nepal, the lower stretch of the Ganges–Yamuna Doab, and Caribbean countries.A distribution of the geographical area can be found in volume 9 of 'Linguistic Survey of India' by George A. Grierson.