[mass noun]the action of marking one's pleasure at an important event or occasion by engaging in enjoyable, typically social, activity 庆祝,欢庆 the birth of his son was a cause for celebration. 他生了个儿子,这是庆贺的原因。 [count noun]a birthday celebration. 一次生日庆祝。
语源
early 16th cent.: from Latin celebratio(n-), from the verb celebrare (see celebrate)