Meaning of 'joint account'

[Marian]

Test No. incompl/inter-11 "Accounts", question 8

Before they got married, they decided to open a ......... account.

(a) united
(b) joint
(c) unified
(d) combined

Test No. incompl/inter-11 "Accounts", answer 8

Before they got married, they decided to open a joint account.

Correct answer: (b) joint

Your answer was: incorrect
Before they got married, they decided to open a united account.
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Hello Alan!
Is 'joint account' an usual expresion which mean a deposit ?

Thank you!

[Mosteque]

Although i'm not Alan, i'll take the liberty to answer.
No, JOINT ACCOUNT doesn't mean a bank deposit. It describes an account that is, brace yourself, JOINT. So both, husband and wife, may use it without asking for "spouse permission" ;)
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obsequium amicos, veritas odium parit