ac·count 
(ə-kount)
(ə-kount)n.
1. A narrative or record of events.
2.
a. A reason given for a particular action or event: What is the account for this loss?
b. A report relating to one's conduct: gave a satisfactory account of herself.
c. A basis or ground: no reason to worry on that account.
3.
a. A formal banking, brokerage, or business relationship established to provide for regular services, dealings, and other financial transactions.
b. A precise list or enumeration of financial transactions.
c. A sum of money deposited for checking, savings, or brokerage use.
d. A customer having a business or credit relationship with a firm: salespeople visiting their accounts.
4. A private access to a computer system or online service, usually requiring a password to enter.
5. Worth, standing, or importance: a landowner of some account.
6. Profit or advantage: turned her writing skills to good account.
tr.v. ac·count·ed, ac·count·ing, ac·counts
Phrasal Verb: To consider as being; deem. See Synonyms at consider. See Usage Note at as1.
account for
Idioms: 1. To constitute the governing or primary factor in: Bad weather accounted for the long delay.
2. To provide an explanation or justification for: The suspect couldn't account for his time that night.
call to account
1. To challenge or contest.
2. To hold answerable for.
on account
On credit.
on account of
Because of; for the sake of: "We got married on account of the baby" (Anne Tyler).
on no account
Under no circumstances.
on (one's) own account
1. For oneself.
2. On one's own; by oneself: He wants to work on his own account.
on (someone's) account
For someone's benefit: It's nice of you to make such an effort on his account.
take into account
To take into consideration; allow for.
[Middle English, from Old French acont, from aconter, to reckon : a-, to (from Latin ad-; see AD-) + cunter, to count (from Latin computāre, to sum up; see COMPUTE).]