As a Noun: 1. The beliefs of any of various Christian groups that emphasise the charismatic aspects of Christianity and adopt a fundamental attitude to the Bible. English = Pentecostalism. 2. A member of any one of various Christian groups that emphasise the charismatic aspects of Christianity and adopt a fundamental attitude to the Bible. English = Pentecostalist. 3. A state in which a person goes into a religious trance and utters sounds and words that are not intelligible as part of any normal spoken language. English = speaking in tongues. As a Verb or Adjective: 1. To relate to any of various Christian groups that emphasise the charismatic aspects of Christianity and adopt a fundamental attitude to the Bible. English = Pentecostal. 2. To go into a religious trance and utter sounds and words that are not intelligible as part of any normal spoken language. English = speak in tongues.