Meaning of 外洋 in Japanese
Definition of 外洋
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(n) open sea; ocean
海の氷はきわめて変わりやすい――寒く風のない天候のときは固く凍っているが、嵐のときは外洋の広い水域で割れてしまう。
The sea ice is highly variable - frozen solid during cold, calm weather and broken up in large areas of open water during storms.