[ noun ] any communication that encodes a message
"signals from the boat suddenly stopped"
Used in print(Dan McLachlan, Jr., "Communication Networks and...)
The need for monitoring became greater when radio was adopted for military signaling .
communication symbol recording indication phone_number radio_beam input_signal indicator output_signal storm_signal dog-ear curfew whistle visual_signal time_signal retreat drumbeat telegraphic_signal animal_communication high_sign electronic_signal distress_signal alarm all_clear radio_beacon starting_signal ticktack bugle_call bespeak signalize sign bless signalize