A fiat is an official order from someone in power who does not stop to ask what other people want. A ruler, a court, a government, sometimes a boss just says it, and it happens.

A fiat一個fiat is an official order是一種正式命令 from someone in power來自掌權的人 who does not stop to ask what other people want這個人不會停下來問別人想要什麼。A ruler, a court, a government, sometimes a boss統治者、法院、政府，有時是老闆 just says it, and it happens只要一句話說出來，事情就這樣定了。

You will mostly meet the set phrase “by fiat,” which means “because they ordered it, not because people agreed.” It is a formal, slightly stiff word; friends do not use it about who washes the dishes.

You will mostly meet the set phrase "by fiat,"你最常遇到的是固定用法「by fiat」，which means "because they ordered it, not because people agreed."意思是「因為他們下令了，不是因為大家同意」。It is a formal, slightly stiff word這是個正式、有點生硬的詞；friends do not use it about who washes the dishes朋友之間不會用它來講誰洗碗。

Though actually, people stretch it. “Fiat money” is ordinary cash that has value because the state says so, not because it is gold in your pocket — that is the same idea of “because we declared it.” As a verb, to fiat something through (to push it through by order) exists, but it is rare.

Though actually, people stretch it不過其實大家會把這個詞用得更寬。"Fiat money"「fiat money」 is ordinary cash that has value because the state says so是那種因為國家說有價值它就有價值的普通現金，not because it is gold in your pocket而不是因為你口袋裡的是黃金 — that is the same idea of "because we declared it."這跟「因為我們宣布了」是同一個概念。As a verb, to fiat something through當動詞用時，to fiat something through (to push it through by order)也就是靠一聲令下把它推行下去 exists, but it is rare這種用法是有的，但很少見。

The car company Fiat uses the same letters; that name is not this word.

The car company Fiat汽車公司Fiat uses the same letters用的是同樣的字母；that name is not this word但那個名字跟這個詞無關。