B2 A priceless object has such a high value, especially because it is rare, that the price of it cannot be calculated.貴重的,無價的
A priceless collection of vases was destroyed.一批貴重的花瓶被毀壞了。
figurative Her knowledge and experience would make her a priceless (= extremely useful) asset to the team.淵博的知識和豐富的經驗會使她成爲隊中的無價之寶。
informal extremely funny to see or hear極其好笑的
You should have seen the look on her face when I told her - it was priceless!你真應該看看我告訴她時她臉上的表情——太好笑了!