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singing voice the range of which is lower than the soprano by the interval of a fifth. More generally, the term refers to the register in which this voice sings, i.e., the second highest part in a four-part musical texture, and to instruments utilizing this register. See countertenorcountertenor,
a male singing voice in the alto range. Singing in this range requires either a special vocal technique called falsetto, or a high extension of the tenor range.
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(graphic arts)
The negative which is electrodeposited during the preparation of plates for printing currency.


1. the highest adult male voice; countertenor
2. (in choral singing) a shortened form of contralto
3. a singer with such a voice
4. another name for viola
5. a flute, saxophone, etc., that is the third or fourth highest instrument in its group
6. denoting a flute, saxophone, etc., that is the third or fourth highest instrument in its group


(1) See Alto Mail.

(2) The desktop computer from Xerox that pioneered the mouse/icon/desktop environment. Developed at the Palo Alto Research Center (PARC), it was the progenitor of Xerox's Star and Apple's Lisa and Mac. Designed in 1973 with built-in Ethernet, it had 128K of RAM, a 608x808 screen and a 2.5MB removable hard disk. About 1,000 Altos were in use by 1979. See PARC.

Alto Computer
The first graphical user interface created for business purposes was working more than 10 years before the Macintosh was introduced. (Image courtesy of Palo Alto Research Center.)
References in periodicals archive ?
Bloomberg reported that Zillow data showed that the median home value has doubled in Palo Alto since 2006, raising it to $2.
The reason could be attributed to the wheelbase of the Alto 800.
Suzuki has developed the new Alto with a view to improving the mileage and reducing the weight,'' Suzuki Chairman Osamu Suzuki said at a press conference in Tokyo.
Powered by a three-cylinder petrol engine with a five-speed gearbox the Alto zips along.
On the WebDownloadable Recipe for Speck Alto Adige PGI
What we don't want is for Alto Parana to continue expanding because their sawmills already handle nearly hall the volume of the market," says Pardal.
Unlike its private forestry school predecessors at Biltmore, in North Carolina, and Yale, in Connecticut, Mont Alto focused on practical training.
It is actually three books in one: a first flute book, second flute book and an alto flute book.
Amid powerful roadfellows jockeying for position in a valuable local information infrastructure, Palo Alto is holding its ground.
Palo Alto, 35 miles south of San Francisco, was founded in 1891 to serve Stanford University as a totally "dry" commercial center.