account

(noun): A registry of pecuniary transactions; a written or printed statement of business dealings or debts and credits, and also of other things subjected to a reckoning or review.
(noun): A sum of money deposited at a bank and subject to withdrawal.
(noun): A statement in general of reasons, causes, grounds, etc., explanatory of some event; a reason of an action to be done.
(noun): A reason, grounds, consideration, motive; a person's sake.
(noun): A business relationship involving the exchange of money and credit.
(noun): A record of events; recital of transactions; a relation or narrative; a report; a description.
(noun): An estimate or estimation; valuation; judgment.
(noun): Importance; worth; value; esteem; judgement.
(noun): An authorization to use a service.
(noun): A reckoning; computation; calculation; enumeration; a record of some reckoning.
(noun): Profit; advantage.

to keep one's account at the bank.
No satisfactory account has been given of these phenomena.
Don't trouble yourself on my account.
An account of a battle.
I've opened an account with Wikipedia so that I can contribute and partake in the project.