margin

An edge and the area immediately adjacent to it; a border. synonym: border.

The blank space bordering the written or printed area on a page.

A limit in a condition or process, beyond or below which something is no longer possible or acceptable.

An amount allowed beyond what is needed: synonym: room.

A measure, quantity, or degree of difference.

The minimum return that an enterprise may earn and still pay for itself.

The difference between the cost and the selling price of securities or commodities.

The difference between the market value of collateral and the face value of a loan.

An amount in money, or represented by securities, deposited by a customer with a broker as a provision against loss on transactions made on account.