occasion/əˋkeʒən; əˈkeIʒ$n/n 1 a) [C] a time when something happens〔某事发生的〕时刻﹐时候: on … occasion They had met on several occasions. 他们见过几次面。 b) [singular 单数] a suitable time or a reason to do something〔合适的〕时机﹔理由: Christmas is an occasion to see old friends. 圣诞节是探望老朋友的好时机。2 [C] an important event 重要的活动: We’re saving the champagne for a special occasion . 我们把这瓶香槟酒留到特别的日子喝。3 on occasion(s) sometimes but not often 偶尔﹐有时: She can be very rude on occasion. 有时她会很无礼。