Sig″nal (?), n. [F., fr. LL. signale, fr. L. signum. See Sign, n.] 1. A sign made for the purpose of giving notice to a person of some occurence, command, or danger; also, a sign, event, or watchword, which has been agreed upon as the occasion of concerted action.
All obeyed
The wonted signal and superior voice
Of this great potentate. Milton.
2. A token; an indication; a foreshadowing; a sign.
The weary sun...
Gives signal of a goodly day to-morrow. Shak.
There was not the least signal of the calamity to be seen. De Foc.