noun
the sudden rush of a large quantity of snow, ice, or rocks down a mountain.
The mountain village was buried in the avalanche.
intransitive verb
to fall or come down suddenly, as in an avalanche.
The library’s bookshelves avalanched as the building shook.
transitive verb
to inundate or overwhelm with a large amount of something.
The TV station was avalanched with letters of protest from viewers.