Speaking in tongues, also known as glossolalia (Greek: γλωσσολαλία), is an activity or practice in which people utter words or speech-like sounds, often thought by believers to be languages unknown to the speaker. One definition used by linguists is the fluid vocalizing of speech-like syllables that lack any readily comprehended meaning. In some cases, as part of religious practice, some believe it to be a divine language unknown to the speaker. Glossolalia is practiced in Pentecostal and charismatic Christianity, as well as in other religions.Sometimes a distinction is made between "glossolalia" and "xenolalia" or "xenoglossy", which specifically relates to the belief that the language being spoken is a natural language previously unknown to the speaker.
Etymology
Glossolalia is a borrowing of the Greek: γλωσσολαλία, translit. ...