Abba/əˈbɑː/ Definition 1 of 3Pro Tip 1/3Spiritual Intimacy Reflects a personal, deep relationship when addressing God. When I feel lost, I turn to Abba in prayer. Pro Tip 2/3Not Common Use More often used in theology or religious texts than everyday conversation. The theologian discussed the concept of Abba in Christian mysticism. Pro Tip 3/3Strong Emotion Used to express fervent emotional pleas or profound worship. Overwhelmed with gratitude, she whispered, 'Thank you, Abba.'