Tuma'ninah, in the context of Islamic prayer (salah), refers to a state of calmness, composure, and tranquility. It involves performing each movement and recitation with deliberation and focus, allowing enough time for each posture to be completed properly. Achieving Tuma'ninah is essential for a valid and spiritually fulfilling prayer, as it allows the individual to connect with Allah sincerely and reflect on the meaning of their actions.