HeyRua Get the app

Ordinal number in Irish (Orduimhir): Meaning, Pronunciation, Usage

The Irish for ordinal number is orduimhir, a feminine noun (plural orduimhreacha).
Updated October 2026Report a mistake

How to say “ordinal number” in Irish

Irish:
orduimhir
English:
ordinal number
Word type:
noun
Gender:
feminine, fifth declension
Pronunciation:
“OR-div-ir”  /ˈɔɾˌd̪ˠɪvʲəɾʲ/
Various forms
Plural:
orduimhreacha (ordinal numbers)
Genitive singular:
orduimhreach, na horduimhreach (e.g. foirm na horduimhreach, the form of the ordinal number)
Genitive plural:
orduimhreacha, na n-orduimhreacha (e.g. liosta na n-orduimhreacha, the list of ordinal numbers)

What does “orduimhir” mean?

ordinal number
A number that shows position or order in a series, such as first, second or third.Also: ordinal, ordinal numeral.

“Orduimhir” with the article

The plural of ordinal number in Irish is orduimhreacha. Here is orduimhir after the article (an t-alt), in the singular and the plural.

an orduimhir
the ordinal number
No change: feminine nouns starting with a vowel keep their form after an
na horduimhreacha
the ordinal numbers
Plural: na adds h before a vowel

“Orduimhir” in a sentence: Irish examples

Common Irish sentences using orduimhir, the Irish word for ordinal number.

Is orduimhir é "an chéad" i nGaeilge.
"An chéad" is an ordinal number in Irish.
Foghlaimeoimid na horduimhreacha inniu.
We will learn the ordinal numbers today.
Cuireann an orduimhir séimhiú ar an ainmfhocal uaireanta.
The ordinal number sometimes lenites the noun.
Scríobh an orduimhir cheart sa bhearna.
Write the correct ordinal number in the gap.
Tá rialacha na horduimhreach casta go leor.
The rules of the ordinal number are quite complicated.
Úsáidtear orduimhreacha le dátaí na míosa.
Ordinal numbers are used with the dates of the month.
Ní raibh an orduimhir sin sa leabhar.
That ordinal number was not in the book.

Other nouns in Irish

More everyday Irish nouns to learn next.

Ordinal number in Irish: frequently asked questions

What is the Irish for ordinal number?

The Irish for ordinal number is orduimhir (pronounced “OR-div-ir”). It’s a feminine noun and the plural is orduimhreacha.

How do you pronounce orduimhir in Irish?

Orduimhir is said like “OR-div-ir” (IPA /ˈɔɾˌd̪ˠɪvʲəɾʲ/).

What is the plural of ordinal number in Irish?

The plural of orduimhir is orduimhreacha; with the article, na horduimhreacha means “the ordinal numbers”. The genitive plural is orduimhreacha, as in liosta na n-orduimhreacha (the list of ordinal numbers).

Why does orduimhir sometimes have a t or h in front of it?

Irish nouns beginning with a vowel take a prefix after certain words: an orduimhir (the ordinal number), a horduimhir (her ordinal number), a n-orduimhir (their ordinal number), na horduimhreacha (the ordinal numbers).

What is the difference between orduimhir and bunuimhir?

A bunuimhir is a cardinal number like a haon, a dó, while an orduimhir shows order, like an chéad, an dara, an tríú.

Learn Irish by
actually speaking it

Learn everyday Irish words like orduimhir through guided conversation with Rua.

7-day free trial. Cancel anytime.

The HeyRua app home screen