Definition of semaphore
1 : an apparatus for visual signaling (as by the position of one or more movable arms)
2 : a system of visual signaling by two flags held one in each hand
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Illustration of semaphore
Origin and Etymology of semaphore
Greek sēma sign, signal + International Scientific Vocabulary -phore
First Known Use: 1815
semaphore
Definition of semaphore
semaphored
;semaphoring
transitive verb
: to convey (information) by or as if by semaphore
intransitive verb
: to send signals by or as if by semaphore
1838
First Known Use of semaphore
1838
SEMAPHORE Defined for English Language Learners
semaphore
playDefinition of semaphore for English Language Learners
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: a system used for sending signals by using two flags that are held in your hands
SEMAPHORE Defined for Kids
semaphore
playDefinition of semaphore for Students
1 : a device for sending signals that can be seen by the receiver
2 : a system of sending signals with two flags held one in each hand
Learn More about semaphore
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See words that rhyme with semaphore Spanish Central: Translation of semaphore Nglish: Translation of semaphore for Spanish speakers Britannica.com: Encyclopedia article about semaphore
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