claxon(noun, verb) noun1. a kind of loud horn formerly used on motor vehiclesSimilar word(s): klaxonDefinition categories: man–made, horn verb1. make a loud noiseSimilar word(s): beep, blare, honk, tootDefinition categories: perception, go, sound2. use the horn of a carSimilar word(s): honkDefinition categories: communication, noise, resound