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Ring fort in Irish (Lios): Meaning, Pronunciation, Usage

‘lios’ also means: fairy fort · enclosure · halo

The Irish for ring fort is lios, a masculine noun (plural liosanna).
Updated October 2026Report a mistake

How to say “ring fort” in Irish

Irish:
lios
English:
ring fort, fairy fort, enclosure, halo
Word type:
noun
Gender:
masculine, third declension
Pronunciation:
“lyiss”  /lʲɪsˠ/
Various forms
Plural:
liosanna (ring forts)
Genitive singular:
leasa, an leasa (e.g. lár an leasa, the middle of the fort)
Genitive plural:
liosanna, na liosanna (e.g. suíomhanna na liosanna, the sites of the ring forts)

What does “lios” mean?

“Lios” has four alternative meanings. The most common comes first.

ring fort
An ancient circular earthen enclosure surrounding a dwelling, common across the Irish countryside.Also: rath, earthen fort, enclosure.
3 other meanings: fairy fort or enclosure or halo
2fairy fort
An old ring fort believed in folklore to be the dwelling place of the fairies.Also: fairy mound, fairy dwelling.
3enclosure
An enclosed space or yard around a building.Also: courtyard, garth, yard.
4halo
A ring of light around the moon or sun.Also: ring, corona.

“Lios” with the article

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

an lios
the ring fort
No change after an
na liosanna
the ring forts
Plural: no change after na

“Lios” in a sentence: Irish examples

Common Irish sentences using lios, the Irish word for ring fort.

Tá lios ar an bhfeirm s'againne.
There's a ring fort on our farm.
Ní ghearrfadh m'athair na sceacha sa lios.
My father wouldn't cut the bushes in the fort.
Deirtear go raibh na sióga ina gcónaí sa lios.
It's said the fairies lived in the fort.
Chuala siad ceol ag teacht ón lios.
They heard music coming from the fort.
Bhí claí an leasa clúdaithe le féar.
The bank of the fort was covered in grass.
Tá na céadta lios ar fud na tíre.
There are hundreds of ring forts throughout the country.

Other nouns in Irish

More everyday Irish nouns to learn next.

Ring fort in Irish: frequently asked questions

What is the Irish for ring fort?

The Irish for ring fort is lios (pronounced “lyiss”). It’s a masculine noun and the plural is liosanna. Depending on context it can also mean fairy fort or enclosure or halo.

How do you pronounce lios in Irish?

Lios is said like “lyiss” (IPA /lʲɪsˠ/).

What is the plural of ring fort in Irish?

The plural of lios is liosanna; with the article, na liosanna means “the ring forts”. The genitive plural is liosanna, as in suíomhanna na liosanna (the sites of the ring forts).

Does lios have more than one meaning?

Yes. Lios can mean ring fort, fairy fort, enclosure or halo, depending on context; the first is the most common.

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

Both mean a ring fort; 'ráth' often refers to the earthen rampart, while 'lios' is the enclosed space within, but they are largely used interchangeably. Both survive in place names like Lios Mór and Ráth Luirc.

Why do so many place names start with 'Lis'?

Names like Lisburn, Lismore and Listowel come from 'lios', marking the site of an old ring fort, e.g. Lios Mór 'great fort'.

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