From Middle English open see, open se, equivalent to open + sea.
open sea (countable and uncountable, plural open seas)
- That part of the sea out of sight of land.
- Synonym: open ocean
- A sea open to all nations, i.e. not a mare clausum.
part of the sea
- Catalan: alta mar f
- Crimean Tatar: açıq deñiz
- Dutch: open zee f, volle zee f
- Finnish: avomeri (fi), aava (fi), aava meri, selkämeri, ulappa (fi), ulkomeri
- French: haute mer (fr) f, large (fr) m
- Galician: altura (gl) f
- Hebrew: הַיָּם הַפָּתוּחַ (he) m (hayam hapatuakh)
- Ingrian: avonain meri
- Irish: mórmhuir f
- Italian: alto mare m
- Japanese: 沖 (ja) (oki)
- Maori: moana waiwai, tahora, moana tuauriuri
- Norman: plieine mé f (Jersey), large m (Jersey)
- Old English: ūtermere m
- Portuguese: alto mar, mar aberto
- Russian: откры́тое мо́ре (ru) n (otkrýtoje móre)
- Serbo-Croatian:
- Cyrillic: пу̀чина f
- Roman: pùčina (sh) f
- Southern Altai: ачык талай (ačïk talay), ачык теҥис (ačïk teŋis)
- Spanish: alta mar (es) f, mar ancha f, piélago (es) m
- Swedish: öppet hav
- Welsh: cefnfor (cy) m, môr mawr m
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