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Word of the Day Tuesday, June 9, 2026

semaphore

/ˈsɛməfeɪ/ noun · British & US
Valid in UKValid in US
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What does semaphore mean?

noun

A signal, especially one given by a flag or light, used to indicate a message or instruction. A system of flags or lights used for communication, especially in navigation.

Example

"The lighthouse used a semaphore to warn ships of the rocky coastline."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for semaphore

Rhymes with semaphore

Etymologically related