klax|on «KLAK suhn», noun.
1. a kind of horn formerly used in automobiles.
2. a horn with a loud, penetrating sound used as a warning signal: »
The Coast Guard klaxon sounded, then the firehouse siren from the town (New Yorker).
╂[< earlier Klaxon, a trademark, apparently coined < Greek klázein scream, clang]
Useful english dictionary. 2012.