semaphore
9 letters · noun · scores 2,600 in SpellHuntr
noun
an apparatus for visual signaling with lights or mechanically moving arms
verb
send signals by or as if by semaphore
Semaphore in a sentence
The thread increments the semaphore to prevent other threads from entering the critical section at the same time.
Even so, there are only four others in my car after leaving the pretty station at Abergavenny, a haven of old GWR semaphores.
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