This document provides definitions and explanations of key terms from the Indian Contract Act of 1872. It defines a contract as an agreement that is enforceable by law, with an agreement being a promise with consideration. A proposal or offer becomes a promise when it is accepted, with acceptance being when the person to whom the proposal is made signifies their assent. Consideration refers to something done or promised in return. The document also notes that contracts create rights against specific persons rather than the whole world.