custom/ˋkʌstəm; ˈkʌstəm/n 1 [C,U] something that people in a particular society do because it is traditional 习俗﹐风俗: local/ancient/French etc custom She follows Islamic custom by covering her hair. 她依照伊斯兰习俗包住头发。it is the custom (for sb) to do sth It's the custom for the bride's father to pay for the wedding. 新娘的父亲支付婚礼费用﹐这是风俗习惯。see box at见 HABIT 方框2 customs [plural 复数] the place where your bags are checked for illegal goods when you enter a country [→ immigration] 海关: All baggage must go through customs. 所有行李必须通过海关。see box at见 AIRPORT 方框3 [U] formal when people regularly use a particular shop or business【正式】〔经常性的〕惠顾﹐光顾: The shop lost custom when a supermarket opened nearby. 附近开了一家超市后﹐这家小店就失去了顾客。