Semaphore is a word for a signalingcommunicating by means of signals or gestures systeman organized set of parts working together for a purpose, usually one that uses lights or moving arms. It can also mean to send informationfacts or details learned, shared, or given to others using that kind of signal.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-25. AI assessment; not a guarantee of accuracy.
Pronunciation
AI-generated pronunciation audio (OpenAI).
Accent: General American English
IPA: /ˈsɛm.ə.fɔr/
Easy pronunciation: SEM-uh-for (approximate spelling).
Stress: Stress the first syllable: SEM.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-25. AI assessment; not a guarantee of accuracy.
Semaphore Meaning
a signaling device or system that uses lights or moving arms
Part of speech: noun
Definition: an apparatus for visual signaling with lights or mechanically moving arms
Example: The railway used a semaphore to control train movements.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-25. AI assessment; not a guarantee of accuracy.
Other Meanings of Semaphore
Meaning 2
to send information using semaphore signals
Part of speech: verb
Definition: convey by semaphore, of information
Example: The ship semaphored a warning to the harbor.
Meaning 3
to signal with semaphore, or in a similar way
Part of speech: verb
Definition: send signals by or as if by semaphore
Example: He semaphored from the deck until the rescue crew noticed him.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-25. AI assessment; not a guarantee of accuracy.
Common Mistakes
- People sometimes confuse semaphore with similar communication words like signal or code, but semaphore specifically refers to a visual signaling system using arms, lights, or similar devices.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-25. AI assessment; not a guarantee of accuracy.
Frequently Asked Questions
What does semaphore mean?
Semaphore means a visual signaling system, often using lights or moving arms, or the act of sending information with that system.
Is semaphore a noun or a verb?
It can be both. As a noun, it refers to the signaling device or system. As a verb, it means to send signals with that system.
What are good synonyms for semaphore?
For the noun sense, there are no very close everyday synonyms. For the verb senses, the word is usually specific enough that common substitutes are limited and context-dependent.
Reviewed with OpenAI Decisions. Assessment: accurate. Checked: 2026-10-25. AI assessment; not a guarantee of accuracy.