Definition of lahar in English:

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Pronunciation: /ˈlähär/


A destructive mudflow on the slopes of a volcano.
Example sentences
  • Some volcanic eruptions generate dangerous lahars (mud flows of volcanic ash mixed with water) that travel far beyond the volcano.
  • Continued growth increases the risk of partial dome collapse, which could trigger moderate explosions and possibly significant lahars (volcanic mudflows) from the crater.
  • Major valleys cutting the volcano's flanks have been partly or completely filled in by pyroclastic flow deposits and lahars.


1920s: from Javanese.

For editors and proofreaders

Syllabification: la·har

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