depositThe car costs $50 per day in rental, plus a $200 deposit which you will get back at the end of the week. You'll get back your deposit once we've checked the bikes are all rht. If furniture isDefine deposit. deposit synonyms, deposit pronunciation, deposit translation, English dictionary definition of deposit. v. de·pos·it·ed , de·pos·it·ing , de·pos·its v. tr. 1. To put or set down;