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Brightness in Irish (Lonracht): Meaning, Pronunciation, Usage

‘lonracht’ also means: luminescence

The Irish for brightness is lonracht, a feminine noun.
Updated October 2026Report a mistake

How to say “brightness” in Irish

Irish:
lonracht
English:
brightness, luminescence
Word type:
noun
Gender:
feminine
Pronunciation:
“LUN-rukht”  /ˈl̪ˠʊn̪ˠɾˠəxt̪ˠ/
Various forms
Genitive singular:
lonrachta, na lonrachta (e.g. leibhéal na lonrachta, the level of brightness)

What does “lonracht” mean?

“Lonracht” has two alternative meanings. The most common comes first.

brightness
The quality of shining or giving off light; brightness or sheen.Also: sheen, radiance, shininess, lustre.
1 other meaning: luminescence
2luminescence
In science, the giving off of light without heat, as by certain chemicals or living things.Also: luminosity, glow.

Other Irish words for brightness: solas (light), gile (brightness), gealgháire (cheerfulness), loinnir (brightness)

“Lonracht” with the article

Here is lonracht after the article (an t-alt).

an lonracht
the brightness
No change after an

“Lonracht” in a sentence: Irish examples

Common Irish sentences using lonracht, the Irish word for brightness.

Bhí lonracht iontach sna réaltaí anocht.
The stars had a wonderful brightness tonight.
Chaill an t-airgead a lonracht le himeacht ama.
The silver lost its sheen over time.
Tá an lonracht le feiceáil san fharraige istoíche.
The luminescence can be seen in the sea at night.
Thomhais na heolaithe déine na lonrachta.
The scientists measured the intensity of the luminescence.
Is cineál lonrachta í an bhithlonracht.
Bioluminescence is a type of luminescence.
Bhí lonracht ina súile nuair a chuala sí an scéal.
There was a brightness in her eyes when she heard the news.
Cuireann an snas lonracht ar an adhmad.
The polish gives the wood a sheen.

Other nouns in Irish

More everyday Irish nouns to learn next.

Brightness in Irish: frequently asked questions

What is the Irish for brightness?

The Irish for brightness is lonracht (pronounced “LUN-rukht”). It’s a feminine noun. Depending on context it can also mean luminescence.

How do you pronounce lonracht in Irish?

Lonracht is said like “LUN-rukht” (IPA /ˈl̪ˠʊn̪ˠɾˠəxt̪ˠ/).

Does lonracht have a plural?

No plural form is given for lonracht in the standard. Many abstract and mass nouns in Irish have no plural.

Does lonracht have more than one meaning?

Yes. Lonracht can mean brightness or luminescence, depending on context; the first is the most common.

How is lonracht different from loinnir?

Loinnir is the everyday word for brightness or radiance, while lonracht is more formal and is the usual technical term for luminescence, as in bithlonracht.

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