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 ?
The magnificent breakfast kitchen opens onto a cosy family room.
The front door opens onto an entrance hall which leads into a well-proportioned formal dining room, which has a feature fireplace.
There are also French doors to the garden from the second/ dining room, which opens onto the 19ft breakfast kitchen.
The steel-framed glass bay opens onto a deck, from which you step down into the wilderness and its abundant wild life, or walk a mile to the beach.
Such transitions are executed so casually that one could easily overlook their implications with regard to categorical relations--and that is also partly the point--but each one opens onto a different context and a different set of cultural associations.
The front door opens onto Wellington Quay, one of the busiest thoroughfares in Dublin, and it throws off the rattle and hum of countless trucks, buses and cabs.
From the 20th floor and up, a private express elevator opens onto 12 full-floor apartments, varying from 4,000 s/f to over 7,000 s/f.
Generously laid out, the center has ample dressing rooms--some even have kitchens and showers--a green room that opens onto a patio, and a generous lobby with outdoor balconies.
This room also opens onto a beautifully landscaped courtyard.
Situated on 40 meticulously landscaped acres, the Grand Wailea Resort Hotel & Spa opens onto Maui's beautiful and picturesque Wailea Beach, voted one of the best beaches in Hawaii and America.
The master bedroom on the first floor opens onto a superb roof garden, and there is also a wet room and a luxury bathroom.
The kitchen, which is in need of modernisation, opens onto the inner courtyard with access to outhouses.