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Ocean in Irish (Aigéan): Meaning, Pronunciation, Usage

The Irish for ocean is aigéan, a masculine noun (plural aigéin).
Updated October 2026Report a mistake

How to say “ocean” in Irish

Irish:
aigéan
English:
ocean
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“AG-yayn”  /ˈaɟeːnˠ/
Various forms
Plural:
aigéin (oceans)
Genitive singular:
aigéin, an aigéin (e.g. grinneall an aigéin, the bottom of the ocean)
Genitive plural:
aigéan, na n-aigéan (e.g. teocht na n-aigéan, the temperature of the oceans)

What does “aigéan” mean?

ocean
A very large expanse of sea, such as the Atlantic or the Pacific.Also: sea, deep sea, main.

Other Irish words for ocean: farraige (sea), muir (sea), lear (sea)

“Aigéan” with the article

The plural of ocean in Irish is aigéin. Here is aigéan after the article (an t-alt), in the singular and the plural.

an t-aigéan
the ocean
Masculine nouns take t before a vowel after an
na haigéin
the oceans
Plural: na adds h before a vowel

“Aigéan” in a sentence: Irish examples

Common Irish sentences using aigéan, the Irish word for ocean.

Tá an t-aigéan an-gharbh inniu.
The ocean is very rough today.
Thrasnaigh siad an tAigéan Atlantach i mbád beag.
They crossed the Atlantic Ocean in a small boat.
Is aoibhinn liom fuaim an aigéin.
I love the sound of the ocean.
Tá plaisteach ag truailliú na n-aigéan.
Plastic is polluting the oceans.
Tá na haigéin ag éirí níos teo.
The oceans are getting warmer.
Cónaíonn míolta móra san aigéan.
Whales live in the ocean.
Chonaic mé aigéan den chéad uair anuraidh.
I saw an ocean for the first time last year.

Other nouns in Irish

More everyday Irish nouns to learn next.

Ocean in Irish: frequently asked questions

What is the Irish for ocean?

The Irish for ocean is aigéan (pronounced “AG-yayn”). It’s a masculine noun and the plural is aigéin.

How do you pronounce aigéan in Irish?

Aigéan is said like “AG-yayn” (IPA /ˈaɟeːnˠ/).

What is the plural of ocean in Irish?

The plural of aigéan is aigéin; with the article, na haigéin means “the oceans”. The genitive plural is aigéan, as in teocht na n-aigéan (the temperature of the oceans).

Why does aigéan sometimes have a t or h in front of it?

Irish nouns beginning with a vowel take a prefix after certain words: an t-aigéan (the ocean), a haigéan (her ocean), a n-aigéan (their ocean), na haigéin (the oceans).

What is the difference between 'aigéan' and 'farraige'?

'Aigéan' is a vast ocean like an tAigéan Atlantach, while 'farraige' is the general word for the sea, as in cois farraige.

What is the Irish for the Pacific Ocean?

It is an tAigéan Ciúin, literally 'the quiet ocean'.

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