Margin refers to the space or distance between two objects or surfaces, often used to describe the blank space around the edges of a page or document. It can also refer to the difference between the cost of a product or service and the price at which it is sold, representing the profit margin for a business. In finance, margin is the amount of money or collateral required to be deposited in order to trade in securities, such as stocks or options. Additionally, margin can refer to the threshold or limit of something, such as the margin of error in a scientific experiment or the margin of victory in a sports game. Overall, margin is a versatile term that can be applied to various contexts, representing the space, difference, or limit between two things.