Signal

verb

'sɪgnəl

Adjective

notably out of the ordinary
“the year saw one signal triumph for the Labour party”

any nonverbal action or gesture that encodes a message
“signals from the boat suddenly stopped”
Similar:SignSignaling
Type of:Communication
any incitement to action
“he awaited the signal to start”
“the victory was a signal for wild celebration”
Type of:IncitementProvocationIncitation
an electric quantity (voltage or current or field strength) whose modulation represents coded information about the source from which it comes
Type of:ElectricityPower

be a signal for or a symptom of
“The economic indicators signal that the euro is undervalued”
Similar:BespeakBetokenIndicate Point
Type of:Tell
communicate silently and non-verbally by signals or signs
“The diner signaled the waiters to bring the menu”
Similar:SignSignaliseSignalize
Type of:IntercommunicateCommunicate