1. of or relating to Pentecostalism, a Christian movement emphasizing the Holy Spirit, spiritual gifts, and ecstatic religious experience
Usage: often capitalized when referring to the religious movement or its adherents
2. of or relating to Pentecost, the Christian festival celebrating the descent of the Holy Spirit on the apostles
Usage: often capitalized; historical or religious context

Examples

• She grew up in a pentecostal church that emphasized speaking in tongues.
• Pentecostal denominations are among the fastest-growing Christian groups worldwide.
• The pentecostal tradition values direct spiritual experience and divine healing.
• Many pentecostal believers practice glossolalia during worship services.
• He attended a pentecostal revival meeting last summer.