all over; a blanket of, one aspect; one side
地面は一面雪で覆われた。
The ground was completely covered in snow.
その辺は全く消えてなくなったようにただ一面の雪だった。
It was nothing but an expanse of snow, as if everything around there had completely vanished.
とても寒かったので、湖は一面氷に覆われた。
It was so cold that the lake was completely covered in ice.
一面火の海
The whole area was engulfed in flames.
— Good Luck, Have Fun, Don't Die (2026)
地面は一面の雪に覆われていた。
The ground was covered in snow.
その家は一面火となった。
The house was engulfed in flames.
一面では"イエス"
In one respect, “yes.”
— 帰ってきたヒトラー (2015)
不幸には立派な一面があるって言うが本当ですな
They say misfortune has a noble side to it, and it's true.
— 生きる (1952)
「言葉の一面は、伝達しようとする意志である」と彼は言う。
“One aspect of language is the will to communicate,” he says.
彼が言う事にも一面の真理がある。
There is some truth to what he says, too.