Real Dictionary

profit
variable noun: A profit is an amount of money that you gain when you are paid more for something than it cost you to make, get, or do it.
verb: If you profit from something, or it profits you, you gain some advantage or benefit from it.
verb: If you profit from something, you earn a profit from it.

profit in Accounting
noun: Profit is the amount by which revenues are more than expenses in a business enterprise over a given period of time.

profit in American English
advantage; gain; benefit
to be of advantage or benefit
to be of profit or advantage to
intransitive verb: to gain an advantage or benefit
noun: pecuniary gain resulting from the employment of capital in any transaction
transitive verb: to be of advantage or profit to

profit in British English
noun: excess of revenues over outlays and expenses in a business enterprise over a given period of time, usually a year
verb: to gain or cause to gain profit

profit in Retail
noun: Profit is the amount of money you gain when you sell something for more than you paid for it.