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1

semaphore

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noun sem·a·phore \ˈse-mə-ˌfȯr\

Simple Definition of semaphore

  • : a system used for sending signals by using two flags that are held in your hands

Source: Merriam-Webster's Learner's Dictionary

Full Definition of semaphore

  1. 1 :  an apparatus for visual signaling (as by the position of one or more movable arms)

  2. 2 :  a system of visual signaling by two flags held one in each hand

Illustration of semaphore

Origin and Etymology of semaphore

Greek sēma sign, signal + International Scientific Vocabulary -phore


First Known Use: 1816


2

semaphore

verb sem·a·phore

Definition of semaphore

semaphored

semaphoring

  1. transitive verb
  2. :  to convey (information) by or as if by semaphore

  3. intransitive verb
  4. :  to send signals by or as if by semaphore



1893

First Known Use of semaphore

1893


SEMAPHORE Defined for Kids

semaphore

play
noun sem·a·phore \ˈse-mə-ˌfȯr\

Definition of semaphore for Students

  1. 1 :  a device for sending signals that can be seen by the receiver

  2. 2 :  a system of sending signals with two flags held one in each hand




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