termination dust

Noun

US uncountable

(US) In Alaska, a light, high-altitude snowfall that indicates the end of summer.

Japanese Meaning

アラスカで、夏の終わりを示す高高度からの軽い雪のこと

When I saw termination dust on the mountain peaks, I knew summer was ending.

山頂に夏の終わりを告げる高地の薄い雪を見て、季節が変わると分かった。

Sense（1）

(US) In Alaska, a light, high-altitude snowfall that indicates the end of summer.

The miners hurriedly prepared for winter as the termination dust settled on the slopes above them.