Khushoo refers to a state of humility, tranquility, and concentration during prayer (Salah) in Islam. It involves a deep focus on the acts of worship, allowing the believer to connect spiritually with Allah, minimizing distractions, and cultivating a sense of inner peace. Achieving khushoo is considered essential for enhancing the quality and sincerity of one's prayers. It is often encouraged through mindfulness and reflection on the meanings of the recitations during Salah.