Meaning of “deposit” - Learner’s Dictionary

deposit

noun [ C ] uk us /dɪˈpɒzɪt/
BUYING

B1 a payment that you make immediately when you decide to buy something, as proof that you will really buy it:

They've put down a deposit on a house.
BANK

an amount of money that you pay into a bank:

to make a deposit
SUBSTANCE

a layer of a substance that has developed from a natural or chemical process:

deposits of iron ore
RENT

an amount of money that you pay when you rent something, and that is given back to you when you return it without any damage

(Definition of “deposit noun” from the Cambridge Learner’s Dictionary © Cambridge University Press)