American Heritage® Dictionary of the English Language, Fourth Edition
- n. A visual signaling apparatus with flags, lights, or mechanically moving arms, as one used on a railroad.
- n. A visual system for sending information by means of two flags that are held one in each hand, using an alphabetic code based on the position of the signaler's arms.
- v. To send (a message) or to signal by semaphore.
Century Dictionary and Cyclopedia
- n. A mechanical device for displaying signals by means of which information is conveyed to a distant point. The word is now confined almost entirely to apparatus used on a railways employing the block system. The blade is a day signal, the lantern is used at night. A vertical position of the blade or a white light exhibited by a lantern indicates safety; a horizontal position of the blade or a red light indicates danger; an intermediate position of the blade or a green light demands a cautious approach with lessened speed.
- To signal with a semaphore; humorously, wave one's arms and signal like a semaphore.
- n. Any visual signaling system with flags, lights, or mechanically moving arms.
- n. A visual system for transmitting information by means of two flags that are held one in each hand, using an alphabetic and numeric code based on the position of the signaler’s arms.
- n. computing A bit, token, fragment of code, or some other mechanism which is used to restrict access to a shared function or device to a single process at a time, or to synchronize and coordinate events in different processes.
- v. transitive, intransitive To signal using (or as if using) a semaphore.
GNU Webster's 1913
- n. A signal telegraph; an apparatus for giving signals by the disposition of lanterns, flags, oscillating arms, etc.
- v. send signals by or as if by semaphore
- v. convey by semaphore, of information
- n. an apparatus for visual signaling with lights or mechanically moving arms
- Borrowed in 1816 from French sémaphore, coined in French from Ancient Greek σῆμα (sêma, "sign"), and -φωρος (-phoros), from φέρω (férō, "to bear, carry"). (Wiktionary)
- Greek sēma, sign + -phore. (American Heritage® Dictionary of the English Language, Fourth Edition)
“The semaphore is a quicker means of communication than the wig wag; but the wig wag can be used in a prone position under shelter.”
“Between ships and the land there are used what are called semaphore signals, which are made by means of a mast provided with three arms and a disk placed at the upper part.”
“The semaphore is a machine with two arms which may be moved into various positions to make letters.”
“The telegraph station at the semaphore was a little, square, stone hut, roofed with slate, perched high on the cliffs.”
“And then Edward, who by this point was in danger of complete mental disintegration, descended further, into a form of anti-language that Sugar called "semaphore".”
“Basically a semaphore is a counter (integer) that allows a thread to get into”
“Slide 17: Semaphores • Dijkstra - 1965 • A semaphore is a data structure consisting of a counter and a queue for storing task descriptors • Semaphores can be used to implement guards on the code that accesses shared data structures • Semaphores have only two operations, wait and release (originally called P and V by Dijkstra) • Semaphores can be used to provide both competition and cooperation synchronization Copyright © 2007 Addison-Wesley.”
“The clue is that Apple has four clocks, with the third of the clocks the London time at 3 o'clock, just like Paul McCartney's arms in the "semaphore" cover of Help!”
“Not via steps that would take me so far off the beaten track that I would be required to send an SOS in semaphore which is my response to being told that I could download my eBook and then transfer it to my iPhone via iTunes, which I hate BTW because it never seems to do anything organically but that's another rant - now I'm in my happy place.”
“Her purring flashed on and off like the lights on top of radio towers, a kind of semaphore rumble.”
These user-created lists contain the word ‘semaphore’.
Words that (mostly) only linguists know.
Codes, ciphers, and other words related to secret ways of communicating. See also Keeping Secrets, a list by oroboros.
denoting an agent or bearer
Words as I learn them.
sign; signal; symbol; index; symptom
A list of words that I have generated over time.
Looking for tweets for semaphore.