Coptic (Bohairic Coptic: ϯⲙⲉⲧⲣⲉⲙⲛ̀ⲭⲏⲙⲓ, timetremǹnkhēmi) is an Egyptian language family of closely related dialects, representing the most recent developments of the Egyptian language, and historically spoken by the Copts, starting from the third century AD in Roman Egypt. Coptic was supplanted by Arabic as the primary spoken language of Egypt following the Muslim conquest of Egypt and was slowly replaced over the centuries. Coptic has no native speakers today, although it remains in daily use as the liturgical language of the Coptic Orthodox Church and of the Coptic Catholic Church. Innovations in grammar, phonology, and the influx of Greek loanwords distinguish Coptic from earlier periods of the Egyptian language. It is written with the Coptic alphabet, a modified form of the Greek alphabet with several additional letters borrowed from the Demotic Egyptian script.

The major Coptic dialects are Sahidic, Bohairic, Akhmimic, Fayyumic, Lycopolitan, and Oxyrhynchite. Sahidic Coptic was spoken between the cities of Asyut and Oxyrhynchus and flourished as a literary language across Egypt in the period c. 325 – c. 800 AD. Bohairic, the language of the Nile Delta, gained prominence in the 9th century and is the dialect used by the Coptic Church. Despite being closely related, Coptic dialects differ from one another in terms of their phonology, morphology, and vocabulary.