This verb means to communicate by gesture, especially nodding or beckoning. Luke 5:7 describes fishermen who 'signaled' to their partners in the other boat to come help with the miraculous catch. The aorist indicates a decisive moment when they realized they couldn't handle the abundance alone. Classical usage shows the word for nodding assent, beckoning, or making any head/hand signal. The cross-linguistic glosses emphasize non-verbal communication. The single biblical occurrence captures the wordless urgency of fishermen overwhelmed by the haul—gesture suffices when immediate help is needed.