An example of a signal is a red light.
An example of signal used as an adjective is the phrase a "signal win" which means a team that usually loses has just won.
An example of signal is to hold up one finger to mean you'll be there in a minute.
The peace treaty was the signal for celebration.
A bugle signal to attack.
A signal exploit; a signal service; a signal act of benevolence.
A signal feat; a signal event.
I signaled the driver to proceed.
They have signaled their willingness to negotiate.
Origin of signal
- Middle English from Old French from Medieval Latin signāle from neuter of Late Latin signālis of a sign from Latin signum sign sign
From American Heritage Dictionary of the English Language, 5th Edition
- From Old French segnal, seignal or Medieval Latin signÄle, noun use of the neuter of Late Latin signÄlis, from Latin signum.