(noun)
an arrangement in which a computer user creates a username and password in order to gain personalized access to and use of a website or application;
e.g. You must create an account with the website before you can access its resources.
(noun)
an arrangement in which an organization such as a bank holds money for a client and sometimes provides goods/services to the client on credit;
e.g. He opened an account with the bank many years ago.
(noun)
a statement of financial transactions conducted over a period of time, including debits, credits, receipts, and expenditure;
e.g. She checked the account to find the records of the purchase.
(verb)
to explain something, to provide a reasonable basis for or analysis of it;
e.g. They were unable to account for the delay in their arrival.
(verb)
to consider, think of, or view something/someone in a particular way;
e.g. I account her as being one of the best players on the team.