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Trillion in Irish (Trilliún): Meaning, Pronunciation, Usage

The Irish for trillion is trilliún, a masculine noun (plural trilliúin).
Updated October 2026Report a mistake

How to say “trillion” in Irish

Irish:
trilliún
English:
trillion
Word type:
noun
Gender:
masculine
Pronunciation:
“TRIL-yoon”  /ˈtʲɾʲɪlʲuːn/
Various forms
Plural:
trilliúin (trillions)
Genitive singular:
trilliúin, an trilliúin (e.g. luach trilliúin euro, the value of a trillion euro)
Genitive plural:
trilliún, na dtrilliún (e.g. luach na dtrilliún, the value of the trillions)

What does “trilliún” mean?

trillion
The number one million million (10 to the power of 12), or in older British usage a million million million.Also: million million, number.

“Trilliún” with the article

The plural of trillion in Irish is trilliúin. Here is trilliún after the article (an t-alt), in the singular and the plural.

an trilliún
the trillion
No change after an
na trilliúin
the trillions
Plural: no change after na

“Trilliún” in a sentence: Irish examples

Common Irish sentences using trilliún, the Irish word for trillion.

Is ionann trilliún agus milliún milliún.
A trillion equals a million million.
Tá fiacha na tíre níos mó ná trilliún.
The country's debt is more than a trillion.
Chosain an tionscadal beagnach trilliún dollar.
The project cost almost a trillion dollars.
Caitheadh trilliúin ar an gcogadh sin.
Trillions were spent on that war.
Scríobh an trilliún i bhfoirm uimhreacha.
Write the trillion in figures.
Tá dhá thrilliún cill i do chorp, nó níos mó.
There are two trillion cells in your body, or more.
Bhí an geilleagar fiú trilliúin euro.
The economy was worth trillions of euro.

Other nouns in Irish

More everyday Irish nouns to learn next.

Trillion in Irish: frequently asked questions

What is the Irish for trillion?

The Irish for trillion is trilliún (pronounced “TRIL-yoon”). It’s a masculine noun and the plural is trilliúin.

How do you pronounce trilliún in Irish?

Trilliún is said like “TRIL-yoon” (IPA /ˈtʲɾʲɪlʲuːn/).

What is the plural of trillion in Irish?

The plural of trilliún is trilliúin; with the article, na trilliúin means “the trillions”. The genitive plural is trilliún, as in luach na dtrilliún (the value of the trillions).

Why does trilliún change to thrilliún or dtrilliún?

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

How many zeros does 'trilliún' have?

In modern usage 'trilliún' is a million million, 1 followed by 12 zeros, matching the English short-scale trillion.

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