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1. the standard monetary unit of the US and its dependencies, divided into 100 cents
2. the standard monetary unit, comprising 100 cents, of the following countries or territories: Antigua and Barbuda, Australia, the Bahamas, Barbados, Belize, Bermuda, the British Virgin Islands, Brunei, Canada, the Cayman Islands, Dominica, East Timor, Ecuador, El Salvador, Fiji, Grenada, Guatemala, Guyana, Hong Kong, Jamaica, Kiribati, Liberia, Malaysia, the Marshall Islands, Micronesia, Namibia, Nauru, New Zealand, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Singapore, Solomon Islands, Taiwan, Trinidad and Tobago, Tuvalu, and Zimbabwe
3. Brit informal (formerly) five shillings or a coin of this value



the monetary unit of the USA, Canada, Australia, New Zealand, Liberia, Ethiopia, Malaysia, Barbadoes, Guyana, Singapore, Trinidad and Tobago, Jamaica, Western Samoa, Hong Kong, and Fiji, as well as of the Bahama Islands, Brunei, and British Honduras. The dollar is divided into 100 cents.

The USA adopted the (silver) dollar in 1786, and the law of 1792 introduced bimetalism in the USA, providing for free coinage of gold and silver dollars. The gold dollar became the monetary unit in 1873, and the gold standard was officially adopted in the USA in 1900, providing for a dollar with 1.50463 grams of pure gold. After World War I (1914-18) the dollar gained dominance among the capitalist currencies, but the world economic crisis of 1929-33 greatly undermined the dollar and forced the USA to give up the gold standard in 1933. In 1934 the dollar was devalued by 40.94 percent and on Jan. 31, 1934, its gold content was fixed at 0.888671 grams of pure gold. Gold dollar coins were withdrawn from circulation and replaced with banknotes. The inflation after World War II (1939-45) reduced the purchasing power of the dollar to less than half of its prewar value.

The US dollar is the main currency of the dollar zone. The following dollar notes and coins are now in circulation: $100, $50, $20, $5, and $2 federal reserve notes (the issue of notes of $500 or more has been discontinued and they are virtually no longer in circulation); $10, $5, $2, and $1 silver certificates (they are gradually being bought up); $5 and $2 treasury notes, called greenbacks; and $1 and half-dollar silver coins and 25, 10, 5, 2, and 1 cent copper and nickel coins. According to the exchange rate set by the Gosbank (State Bank) of the USSR, US $100 were equal to 82.90 rubles on Dec. 24, 1971. The chronic deficit in the balance of payments the USA has been experiencing since the 1950’s is reducing gold reserves; this deficit and inflation have greatly lowered the purchasing power of the dollar, and its international position has become weaker. The acute currency crisis in the spring and summer of 1971 undermined the dollar as the key capitalist currency. In December 1971 the dollar was devalued by 7.89 percent and its gold content was lowered, while the official price of gold rose from $35 to $38 for a Troy ounce (31.1035 g).



A unit of reactivity, equal to the difference between the reactivities for delayed critical and prompt critical conditions in a given nuclear reactor.


"$" Common names: ITU-T: dollar sign. Rare: currency symbol; buck; cash; string; escape (when used as the echo of ASCII ESC); ding; cache; INTERCAL: big money.

Well-known uses of the dollar symbol in computing include as a prefix on the names of string variables in BASIC, shell and related languages like Perl. In shell languages it is also used in positional parameters so "$1" is the first parameter to a shell script, "$2" the second, etc.
References in classic literature ?
Den I reck'n'd I'd inves' de thirty-five dollars right off en keep things a-movin'.
Balch was not required to pay a cent in advance, except his railway fare, and before he was many years older he had sold his lease for a handsome fortune of a quarter of a million dollars, honestly earned by his initiative and enterprise.
They fell into a conversation, and the Northern lady became so much interested in the effort being made at Tuskegee that before they parted Miss Davidson was handed a check for fifty dollars.
Sixty thousand dollars, or thereabouts," the young man answered despairingly.
We can do it nicely for three hundred dollars," she answered.
I only came out to buy a few trifles, and brought but fifty dollars with me; and Pa insists on having no bills.
At the rate of sixteen dollars to the ounce, the pan had contained seven hundred and odd dollars.
God's own mad lover should do anything for the kiss, but not for thirty thousand dollars a year.
If we restored it to its rightful owner there was fifty dollars in it for us.
Everybody say, 'Charley, two hundred dollars you take me in canoe,' 'Charley, three hundred dollars,' 'Charley, four hundred dollars.
By the joint effort of capital and labor one hundred dollars of value was added.
The clayey and sandy soils had acquired extreme hardness under the action of the heat; but, by the aid of the machines, the rubbish on being dug out was rapidly carted away on railway wagons; and such was the ardor of the work, so persuasive the arguments of Barbicane's dollars, that by the 3rd of September all traces of the mould had entirely disappeared.