nouns
the boundary line or the area immediately inside the boundary
an amount beyond the minimum necessary
"the margin of victory"
is a type of (narrower)
the relative magnitude of something with reference to a criterion
"an adequate amount of food for four people"
the amount of collateral a customer deposits with a broker when borrowing from the broker to buy securities
(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"
is a part of
one side of one leaf (of a book or magazine or newspaper or letter etc.) or the written or pictorial matter it contains
is a type of (narrower)
a blank area
"write your name in the space provided"
a permissible difference; allowing some freedom to move within limits