margin
noun
the boundary line or the area immediately inside the boundary
an amount beyond the minimum necessary
“the margin of victory”
the amount of collateral a customer deposits with a broker when borrowing from the broker to buy securities
Synonymssecurity deposit(finance) the net sales minus the cost of goods and services sold
the blank space that surrounds the text on a page
“he jotted a note in the margin”
a permissible difference; allowing some freedom to move within limits
Source: WordNet 3.1, Princeton University
