noun a system of sending messages by holding the arms or two flags or poles in certain positions according to an alphabetic code
verb to send a message using a semaphore system
In military operations, semaphores are used for visual communication over long distances, often using flags or lights to send messages.
Semaphore flags are used in maritime communication to signal between ships or between ships and shore.
Semaphore signals may be used in aviation to communicate between aircraft and ground control.
In computer science, semaphores are a synchronization primitive used for controlling access to shared resources in multi-threaded programs.
Semaphore code has been used historically in telecommunications for transmitting messages using visual signals.
Semaphore signals are historically used in railway operations to control train movements and signaling.
In the field of writing, a semaphore may refer to a signaling device used to communicate messages over long distances, or it may be used metaphorically to describe the use of symbols or gestures to convey meaning in writing.
Psychologists may use the concept of semaphore in the context of nonverbal communication, such as body language or facial expressions, to analyze and interpret the underlying emotions or intentions of individuals.
In computer science, semaphores are a synchronization primitive used to control access to shared resources in multi-threaded or parallel computing environments. They help prevent race conditions and ensure orderly execution of processes.
In maritime engineering, a semaphore may refer to a system of visual signaling using flags or lights to communicate messages between ships or between a ship and a shore station. It is an important method of communication for navigation and safety at sea.