exists and is an alternate of . It refers to the difficulty in convincing people of something using only words compared to the use of action. Getting someone to believe this [thing] can do [whatever] is a lot easier when the thing actually does do whatever it is claimed to do.
Definition of margin for English Language Learners. : 1  the part of a page that is above, below, or to the side of the printed part. : 2  the place where something (such as a piece of land) stops : the edge of something. : 3  an extra amount of something (such as time or space) that can be used if it is needed.
Gross margin is the difference between revenue and cost of goods sold (COGS) divided by revenue. Gross margin is expressed as a percentage. Generally, it is calculated as the selling price of an item, less the cost of goods sold (e.g. production or acquisition costs, not including indirect fixed costs like office expenses, rent, or administrative costs).