The Code of Civil Procedure 1908 governs civil procedures across India, excluding certain regions like Nagaland and tribal areas unless extended by state notification. Key definitions include 'decree', 'district', and 'foreign court', outlining the roles and functions related to civil suits, such as jurisdiction and execution of decrees. The code establishes that suits should be initiated in the lowest competent court and contains provisions on res judicata and the transfer of decrees for execution.