Deposit  —n. 1 a money in a bank account. B anything stored for safe keeping. 2 a payment made as a pledge for a contract or as an initial part payment for a thing bought. B returnable sum paid on the hire of an item. 3 a natural layer of sand, rock, coal, etc. B layer of accumulated matter on a surface. —v. (-t-) 1 a put or lay down (deposited the book on the shelf). B (of water etc.) Leave (matter etc.) Lying. 2 a store or entrust for keeping. B pay (a sum of money) into a bank account. 3 pay (a sum) as part of a larger sum or as a pledge for a contract. [latin pono posit- put]