dollar (EN)

noun

noun “dollar”

1. the official unit of currency in the United States, Canada, Australia, and some other countries, symbolized by "$"
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   She paid ten dollars for the book.
2. (with "the") the market value of the US dollar
   The dollar weakened today compared to yesterday.
3. (in nuclear physics) a unit of nuclear reactor reactivity equal to the difference between delayed criticality and prompt criticality
   The safety report mentioned a reactivity increase of 0.3 dollars.
4. (historical, UK) a coin worth five shillings or a quarter of a pound
   In Victorian times, a "dollar" referred to a British crown coin.