klaxon

[ klak-suh n ]

/ ˈklæk sən /

a loud electric horn, formerly used on automobiles, trucks, etc., and now often used as a warning signal.

Origin of klaxon

An Americanism dating back to 1905–10; formerly trademark

Old Swainson answered on his Klaxon, and then the liner began to move slowly over the glittering water.

The Air Pirate |Cyril Arthur Edward Ranger Gull
They consisted of bells, gongs, Klaxon horns, and beautiful rockets that burst in a green flare.

Average Americans |Theodore Roosevelt
Also we used the mellow horn, for our book said that horns of the Klaxon type are not allowed in Switzerland.

The Car That Went Abroad |Albert Bigelow Paine
The plane's klaxon horn wailed through the night with a noise audible for miles.

The Blue Ghost Mystery |Harold Leland Goodwin

A klaxon was sounding, and warning lights flashed from the landing slot, to warn ships away from an attempted landing.

Final Weapon |Everett B. Cole

klaxon

/ (ˈklæksən) /

a type of loud horn formerly used on motor vehicles

C20: former trademark, from the name of the manufacturing company