- anything that serves to indicate, warn, direct, command, or the like, such as a light, a gesture, an act, etc.: a traffic signal;a signal to leave.
- anything agreed upon or understood as the occasion for concerted action.
- an act, event, or the like that causes or incites some action: The unjust execution was the signal for revolt.
- a token; indication.
- an electrical quantity or effect, as current, voltage, or electromagnetic waves, that can be varied in such a way as to convey information.
- a play that reveals to one's partner a wish that they continue or discontinue the suit led.
- serving as a token or indication; used in communiating an intention, warning, or command: a signal flag.
- unusual; notable; outstanding: a signal exploit.
- to make a token or indication to.
- to communicate or make known by a token or indication.
- to make communication by something that serves to indicate, warn, direct, command, or the like.
- any sign, gesture, token, etc, that serves to communicate information
- anything that acts as an incitement to action
- a variable parameter, such as a current or electromagnetic wave, by which information is conveyed through an electronic circuit, communications system, etc
- the information so conveyed
- (as modifier)
- distinguished or conspicuous
- used to give or act as a signal
- to communicate (a message, etc) to (a person)
