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Rear light in Irish (Cúlsolas): Meaning, Pronunciation, Usage

‘cúlsolas’ also means: backlight

The Irish for rear light is cúlsolas, a masculine noun (plural cúlsoilse).
Updated October 2026Report a mistake

How to say “rear light” in Irish

Irish:
cúlsolas
English:
rear light, backlight
Word type:
noun
Gender:
masculine
Pronunciation:
“KOOL-sul-us”  /ˈkuːlˌsˠʊl̪ˠəsˠ/
Various forms
Plural:
cúlsoilse (rear lights)
Genitive singular:
cúlsolais, an chúlsolais (e.g. bolgán an chúlsolais, the rear light bulb)
Genitive plural:
cúlsoilse, na gcúlsoilse (e.g. ag deisiú cúlsoilse, repairing rear lights)

What does “cúlsolas” mean?

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

rear light
A light at the back of a vehicle or bicycle, usually red, that shows other road users where it is.Also: tail light, back light, taillight.
1 other meaning: backlight
2backlight
Light that comes from behind a subject or screen, as in photography or on a display.Also: backlighting, back lighting.

“Cúlsolas” with the article

The plural of rear light in Irish is cúlsoilse. Here is cúlsolas after the article (an t-alt), in the singular and the plural.

an cúlsolas
the rear light
No change after an
na cúlsoilse
the rear lights
Plural: no change after na

“Cúlsolas” in a sentence: Irish examples

Common Irish sentences using cúlsolas, the Irish word for rear light.

Tá cúlsolas an rothair briste.
The bicycle's rear light is broken.
Las an cúlsolas sula dtéann tú amach.
Turn on the rear light before you go out.
Bhí an cúlsolas ag obair ar maidin.
The rear light was working this morning.
Stop na gardaí é mar nach raibh cúlsoilse ar an gcarr.
The guards stopped him because the car had no rear lights.
Cheannaigh mé cúlsolas nua do mo rothar.
I bought a new rear light for my bike.
Tá ceallra nua de dhíth ar mo chúlsolas.
My rear light needs a new battery.
Chonaic mé cúlsoilse dearga sa cheo.
I saw red tail lights in the fog.

Other nouns in Irish

More everyday Irish nouns to learn next.

Rear light in Irish: frequently asked questions

What is the Irish for rear light?

The Irish for rear light is cúlsolas (pronounced “KOOL-sul-us”). It’s a masculine noun and the plural is cúlsoilse. Depending on context it can also mean backlight.

How do you pronounce cúlsolas in Irish?

Cúlsolas is said like “KOOL-sul-us” (IPA /ˈkuːlˌsˠʊl̪ˠəsˠ/).

What is the plural of rear light in Irish?

The plural of cúlsolas is cúlsoilse; with the article, na cúlsoilse means “the rear lights”. The genitive plural is cúlsoilse, as in ag deisiú cúlsoilse (repairing rear lights).

Does cúlsolas have more than one meaning?

Yes. Cúlsolas can mean rear light or backlight, depending on context; the first is the most common.

Why does cúlsolas change to chúlsolas or gcúlsolas?

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

What is the opposite of 'cúlsolas' on a car?

The front headlight is 'ceannsolas' (plural 'ceannsoilse'), while 'cúlsolas' is the rear light.

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