Merriam-Webster Collegiate Dictionary - deposit

 I. verb  (~ed; ~ing)  Etymology: Latin ~us, past participle of deponere  Date: 1624  transitive verb  1. to place especially for safekeeping or as a pledge; especially to put in a bank  2.  a. to lay down ; place  b. to let fall (as sediment)  intransitive verb to become ~ed  • ~or noun  II. noun  Date: 1621  1. the state of being ~ed  2. something placed for safekeeping: as  a. money ~ed in a bank  b. money given as a pledge or down payment  3. a place of ~ ; ~ory  4. an act of ~ing  5.  a. something laid down; especially matter ~ed by a natural process  b. a natural accumulation (as of iron ore, coal, or gas)