Joint Account

An account that is shared by two or more people. (Cambridge Dictionary)

A joint bank account generally works like any other checking or savings account. The difference is that two people—married or unmarried partners, parent and child, senior and caregiver—own the account and both have full control over it. That means each account owner can obtain a debit card, make purchases, may be able to write checks and make deposits and withdrawals—all with or without the other’s consent. (Better Money Habits)

A joint account is a bank or brokerage account shared between two or more individuals. Joint accounts are most likely to be used by relatives, couples, or business partners who have a level of familiarity and trust with each other.
A joint account functions like a standard account, such as a checking or savings account, and allows anyone named on the account to access its funds. All owners can withdraw cash, write checks, and make online payments.( Investopedia)

Sources:

joint account. Cambridge Dictionary | English Dictionary, Translations & Thesaurus. URL: https://dictionary.cambridge.org/dictionary/english/joint-account

Better Money Habits. Joint bank accounts: What you need to know. Bank of America. URL: http://surl.li/qbnbe

Kagan, J. (2023). Joint Account: What It Is, How It Works, Benefits, and Pitfalls. Investopedia. URL: https://www.investopedia.com/terms/j/jointaccount.asp