open

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open

1. Nautical free from navigational hazards, such as ice, sunken ships, etc.
2. Music
a. (of a violin or guitar string) not stopped with the finger
b. (of a pipe, such as an organ pipe) not closed at either end
c. (of a note) played on such a string or pipe
3. Commerce
a. in operation; active
b. unrestricted; unlimited
4. (of a wound) exposed to the air
5. (esp of the large intestine) free from obstruction
6. Chess (of a file) having no pawns on it
7. Maths (of a set) containing points whose neighbourhood consists of other points of the same set
8. Computing (of software or a computer system) designed to an internationally agreed standard in order to allow communication between computers, irrespective of size, maufacturer, etc.

open

[′ō·pən]
(electricity)
Condition in which conductors are separated so that current cannot pass.
Break or discontinuity in a circuit which can normally pass a current.

open

(1)
To prepare to read or write a file. This usually involves checking whether the file already exists and that the user has the necessary authorisation to read or write it. The result of a successful open is usually some kind of capability (e.g. a Unix file descriptor) - a token that the user passes back to the system in order to access the file without further checks and finally to close the file.

open

(2)
Abbreviation for "open (or left) parenthesis" - used when necessary to eliminate oral ambiguity. To read aloud the LISP form (DEFUN FOO (X) (PLUS X 1)) one might say: "Open defun foo, open eks close, open, plus eks one, close close."

open

(3)
Non-proprietary. An open standard is one which can be used without payment.

open

(1) To engage a file for reading and writing. Technically, an app is "run" and the data file is "opened." For example, after a word processing application is "loaded and run," a document is "opened" for editing or printing. Then, the document is "closed," and the app is "exited." Apps are also said to be "opened" and "closed."

In the case of a script or batch file, "open" can mean "open" for editing or "open and run." The difference is significant. Opening a batch file to edit its contents causes no action until the user makes changes, whereas opening and running a batch file causes instructions to be executed. Contrast with close.

(2) To "run" a program (application). "Open" is increasingly used to mean "load and run."

(3) With regard to a switch, open is "off." See switch.

(4) Made to operate or function compatibly with other products. See open architecture, open system and open source.
References in periodicals archive ?
All houses share the common ice cream parlor and living room opening onto a terrace with a view across the harbor.
The original kitchen was cramped anddark, opening onto an equally gloomy laundry porch.
Other features included 12-foot ceilings, a great room with receding glass doors opening onto a lakefront lanai, and a formal dining room flanked by majestic columns.
There is also a stylish study with French doors opening onto the gardens at the rear of the property, a cosy family room and a beautiful conservatory also opening onto the gardens.
But 29 residents wrote in claiming the fence would be an eyesore, is too high and that gates opening onto the street would cause problems.
The front door is accessed through an arched timber door opening onto a brick pavior path which curves and leads up to an open canopied porch.
Leading off from here, there is a generously-proportioned drawing room, which has a delightful feature fireplace and magnificent French doors opening onto the gardens, a cosy sitting room, a private study, a cloakroom and a utility room.
Because of the hotel's prime downtown setting, shops string out along two sides of its street level, with front doors opening onto busy boulevards and rear doors opening into the lobby.
These two particular Marlboroughs also benefit from a garden room with French doors opening onto the garden.
Nicole also features a state-of-the-art fitness center and lounge with coffee bar, opening onto a garden terrace which gives residents a place to work out, lounge about, meditate or mingle with fellow residents.
Early in his career, John Divola gained public recognition with a series of photographs titled "Zuma," 1978-79, a set of interior views of an old beachfront property with a single, central window opening onto the Pacific, like a picture within a picture.