
die Bank
bank
A company that offers financial services, such as managing accounts, granting loans, and handling payment transactions.
Ich muss zur Bank gehen, um Geld abzuheben.
I have to go to the bank to withdraw money.
bank / bench
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bank
A company that offers financial services, such as managing accounts, granting loans, and handling payment transactions.
Ich muss zur Bank gehen, um Geld abzuheben.
I have to go to the bank to withdraw money.

bench
A long piece of seating furniture for several people, often found in parks, gardens, or public spaces.
Lass uns eine Pause auf der Bank dort drüben machen.
Let's take a break on the bench over there.

bench
In sports, the seating area for substitute players and coaches at the edge of the field.
Der Stürmer musste das ganze Spiel über auf der Bank sitzen.
The striker had to sit on the bench for the whole game.

across the board
An idiom that means 'without exception' or 'consistently'.
Die Schüler waren durch die Bank gut auf die Prüfung vorbereitet.
The students were well prepared for the exam across the board.

bank
An institution or place for storing and providing important resources, e.g. a blood bank or a database.
Die Patientin erhielt eine Spende von der Blutbank.
The patient received a donation from the blood bank.

bank
A shallow area of sand or gravel in the sea or in a river.
Vorsicht, vor der Küste gibt es eine große Sandbank.
Careful, there is a large sandbank off the coast.
The two most common meanings are the financial institution and the seating furniture. The context makes clear what is meant: words like 'Geld' (money) or 'Konto' (account) point to the financial institution, while 'sitzen' (to sit) or 'Park' (park) point to the bench.
Ich habe ein neues Konto bei einer anderen Bank eröffnet.
I opened a new account at another bank.
In connection with the financial institution, certain prepositions are typical. You go 'zur Bank' (to the bank, direction), work 'bei der Bank' (at the bank, employer), and have money 'auf der Bank' (in the bank, location).
Er arbeitet seit zehn Jahren bei dieser Bank.
He has been working at this bank for ten years.
When the seating option is meant, the preposition 'auf' is almost always used. Movement is expressed with the accusative ('sich auf die Bank setzen' — to sit down on the bench), and a state with the dative ('auf der Bank sitzen' — to be sitting on the bench).
Setz dich doch einen Moment auf die Bank.
Sit down on the bench for a moment.
In a sports context, 'die Bank' (the bench) refers to the area for substitute players. The expression 'auf der Bank sitzen' (to sit on the bench) means that a player is not actively taking part in the game.
Der verletzte Spieler saß während des Finales nur auf der Bank.
The injured player only sat on the bench during the final.
The idiom 'durch die Bank' is a fixed unit and means 'without exception' or 'all without exception'. It has nothing to do with money or sitting.
Die Kritiken für den neuen Film waren durch die Bank positiv.
The reviews for the new film were positive across the board.
In meanings like 'Datenbank' (database) or 'Blutbank' (blood bank), 'Bank' is the second part of a compound word. The first part (e.g. 'Daten' (data), 'Blut' (blood)) explains what is collected or stored there.
Alle Kundendaten sind in einer sicheren Datenbank gespeichert.
All customer data is stored in a secure database.
credit institution
Here, Bank and Kreditinstitut refer to a company that conducts banking business. Bank is the usual everyday term. Kreditinstitut is a more formal collective term that includes, for example, banks and savings banks, and is especially suitable for official texts.

Ich frage meine Bank nach einem günstigeren Kredit.
I’m asking my bank about a cheaper loan.
Im Vertrag wird das Kreditinstitut genannt, das den Kredit vergibt.
The contract names the credit institution that is granting the loan.