警けい戒かい信しん号ごうMeaningsNoun1. warning signal; restricted speed signalKanji used警to police (something)戒commandment信belief号ID numberComposed of警けい戒かいvigilance; caution; alertness; precaution; being on guardNoun信しん号ごうsignal; signalling; signaling; traffic light; traffic signalNoun