depositDefine 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;Since 2007 we've focused solely on perfecting deposit protection. At The DPS, we don't play around when it comes to deposit protection. For over 13 years, we've driven ourselves to