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Fort in Irish (Dún): Meaning, Pronunciation, Usage

‘dún’ also means: haven · residence · to close

The Irish for fort is dún, a masculine noun (plural dúnta).
Updated October 2026Report a mistake

How to say “fort” in Irish

Irish:
dún
English:
fort, haven, residence
Word type:
noun
Gender:
masculine, first declension
Pronunciation:
“doon”  /d̪ˠuːnˠ/
Various forms
Plural:
dúnta (forts)
Genitive singular:
dúin, an dúin (e.g. ballaí an dúin, the walls of the fort)
Genitive plural:
dúnta, na ndúnta (e.g. iarsmaí na ndúnta, the remains of the forts)

What does “dún” mean?

“Dún” has three alternative meanings. The most common comes first.

fort
An ancient fortified enclosure or stronghold, often a ringfort or earthwork.Also: fortress, stronghold, ringfort.
2 other meanings: haven or residence
2haven
A place of refuge or shelter, such as a safe harbour.Also: refuge, shelter.
3residence
A fortified residence or stately house of a chief.Also: mansion, house.
Other entries for “dún”

The same spelling has its own page as:

“Dún” with the article

The plural of fort in Irish is dúnta. Here is dún after the article (an t-alt), in the singular and the plural.

an dún
the fort
No change after an
na dúnta
the forts
Plural: no change after na

“Dún” in a sentence: Irish examples

Common Irish sentences using dún, the Irish word for fort.

Tá dún ársa ar bharr an chnoic.
There is an ancient fort on top of the hill.
Thógamar pictiúir den dún inné.
We took pictures of the fort yesterday.
Bhí an rí ina chónaí sa dún.
The king lived in the fort.
Siúlaimid timpeall bhallaí an dúin.
We walk around the walls of the fort.
Tá go leor dúnta sa cheantar seo.
There are a lot of forts in this area.
Seo é an dún is mó in Éirinn.
This is the biggest fort in Ireland.
Deirtear go bhfuil sióga ina gcónaí sa dún.
It is said that fairies live in the fort.

Other nouns in Irish

More everyday Irish nouns to learn next.

Fort in Irish: frequently asked questions

What is the Irish for fort?

The Irish for fort is dún (pronounced “doon”). It’s a masculine noun and the plural is dúnta. Depending on context it can also mean haven or residence.

How do you pronounce dún in Irish?

Dún is said like “doon” (IPA /d̪ˠuːnˠ/).

What is the plural of fort in Irish?

The plural of dún is dúnta; with the article, na dúnta means “the forts”. The genitive plural is dúnta, as in iarsmaí na ndúnta (the remains of the forts).

Does dún have more than one meaning?

Yes. Dún can mean fort, haven or residence, depending on context; the first is the most common. Dún also has its own entry as a verb meaning to close.

Why does dún change to dhún or ndún?

Irish changes the start of some words after certain words. After mo (my) dún becomes mo dhún (lenition), and after ár (our) or i (in) it becomes ár ndún (eclipsis).

Is 'dún' the same as the verb 'dún' (close)?

They are spelled the same, but the noun 'dún' means a fort, while the verb 'dún' means to close, as in 'Dún an doras'.

What is the difference between 'dún' and 'lios'?

A 'lios' or 'ráth' is usually an earthen ringfort, while 'dún' often suggests a stronger stone fort or stronghold, such as Dún Aonghasa.

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