nouns
the basic monetary unit in many countries; equal to 100 cents
is a type of (narrower)
a unit of money
a piece of paper money worth one dollar
a United States coin worth one dollar
"the dollar coin has never been popular in the United States"
is a type of (narrower)
a flat metal piece (usually a disc) used as money
a symbol of commercialism or greed
"he worships the almighty dollar"; "the dollar sign means little to him"