/ˈævəlɑ:nʃ; US -læntʃ ||; ˈævḷˌæntʃ/noun [C] a very large amount of snow that slides quickly down the side of a mountain 雪崩: Two skiers are still missing after yesterday's avalanche. 昨天雪崩以后，仍有两个滑雪者失踪。