sem·a·phore
(sĕmə-fôr′)
(sĕmə-fôr′)n.
1. A visual signaling apparatus with flags, lights, or mechanically moving arms, as one used on a railroad.
2. A visual system for sending information by means of two flags that are held one in each hand, using an alphabetic code based on the position of the signaler's arms.
tr. & intr.v.sem·a·phored, sem·a·phor·ing, sem·a·phores
To send (a message) or to signal by semaphore.
[Greeksēma, sign + -PHORE.]
sem′a·phoricadj.
sem′a·phori·cal·lyadv.
semaphoretop: railroad signal
bottom: flag signal system