dollar

noun6

1. •
   the main unit of money in the United States and in some other places around the world
2. •
   (Malaysia, informal) A ringgit, a unit of currency in Malaysia.
3. •
   Money generally.
4. •
   (UK, informal) A quarter of a pound or one crown, historically minted as a coin of approximately the same size and composition as a then-contemporary dollar coin of the United States, and worth slightly more.
5. •
   [before a noun] (historical) Imported from the United States, and paid for in U.S. dollars. (Note: distinguish "dollar wheat", North American farmers' slogan, meaning a market price of one dollar per bushel.)

   • The restricted purchase of dollar tobacco will, we hope, have the effect of increasing the imports of Turkish and Grecian tobacco — 1952
6. •
   A unit of reactivity equal to the interval between delayed criticality and prompt criticality.