Definition of klaxon in English:

klaxon

noun

trademark
  • An electric horn or warning hooter:

    ‘the tug blew its klaxon three times’
    • ‘As a police helicopter thundered overhead, many of the demonstrators sounded klaxons and blew horns to make their point.’
    • ‘After all the excitement had died down and we were getting on with what we were doing beforehand, the fire klaxon sounded again.’
    • ‘Somewhere, off in the distance, a klaxon sounded and everyone around me started running.’
    • ‘Alarm klaxons started to sound throughout the corridors.’
    • ‘Warning klaxons went off, flooding the room with flashing red light.’

Origin

Early 20th century: from the name of the manufacturing company.

Pronunciation:

klaxon

/ˈklaks(ə)n/