1. Of, relating to, or occurring at Pentecost.2. Of, relating to, or being any of various Christian religious congregations whose members seek to be filled with the Holy Spirit, in emulation of the Apostles at Pentecost.3. A member of a Pentecostal congregation
any member of a Pentecostal religious body of or relating to or occurring at Pentecost of or relating to or characteristic of any of various Pentecostal religious bodies or their members