Singular

das

Aquarium

Q: Is it der, die, or das Aquarium?

It is das Aquarium. In German, every noun has a grammatical gender, and Aquarium is neuter. You should always learn the article together with the noun to ensure your German grammar is correct.

Q: What is the plural of das Aquarium?

The plural form of das Aquarium is die Aquarien. In German, regardless of the singular gender, all plural nouns use the definite article “die.”

Q: What does das Aquarium mean in English?

The German word das Aquarium translates to “aquarium” in English.

Q: How do you decline das Aquarium?

Like all German nouns, Aquarium changes its article depending on the case. In the singular, the forms are: Nominativ: das Aquarium Akkusativ: das Aquarium Dativ: dem Aquarium Genitiv: des Aquariums These changes are necessary because German uses cases to indicate the noun’s role in a sentence (such as the subject or object). Knowing these forms allows you to build grammatically correct sentences.

aquarium

Plural: die Aquarien

Strong

Why does the noun Aquarium have the article das?

Nouns ending in -um (Latin origin) are neuter. Look at the bolded -um in the noun above — that suffix is the giveaway.

Examples

das Museum (museum), das Zentrum (center), das Datum (date), das Album (album), das Stadium (stadium), das Aquarium (aquarium), das Publikum (audience)

View all words for this rule

Declension table for German noun Aquarium

How it changes across the four cases.

Case	Definite	Indefinite	Negative
Nominativ	das Aquarium	ein Aquarium	kein Aquarium
Akkusativ	das Aquarium	ein Aquarium	kein Aquarium
Dativ	dem Aquarium	einem Aquarium	keinem Aquarium
Genitiv	des Aquariums	eines Aquariums	keines Aquariums
Nominativ	die Aquarien	Aquarien	keine Aquarien
Akkusativ	die Aquarien	Aquarien	keine Aquarien
Dativ	den Aquarien	Aquarien	keinen Aquarien
Genitiv	der Aquarien	Aquarien	keiner Aquarien

Examples in context

Real sentences using Aquarium in different cases.

Case	Definite	Indefinite	Negative
Nominativ	Das große Aquarium steht hier.The large aquarium stands here.	Ein neues Aquarium ist schön.A new aquarium is beautiful.	Kein Aquarium ist leer.No aquarium is empty.
Akkusativ	Ich kaufe das neue Aquarium.I buy the new aquarium.	Er sucht ein großes Aquarium.He is looking for a large aquarium.	Wir haben kein Aquarium gesehen.We haven't seen any aquarium.
Dativ	Ich helfe dem großen Aquarium.I help the large aquarium.	Er gibt einem Aquarium Wasser.He gives water to an aquarium.	Ich spreche mit keinem Aquarium.I don't speak with any aquarium.
Genitiv	Die Größe des neuen Aquariums ist wichtig.The size of the new aquarium is important.	Der Inhalt eines Aquariums ist klar.The content of an aquarium is clear.	Ich kenne den Besitzer keines Aquariums.I know the owner of no aquarium.
Nominativ	Die kleinen Aquarien sind sauber.The small aquariums are clean.	Viele Aquarien brauchen Pflege.Many aquariums need care.	Keine Aquarien sind kaputt.No aquariums are broken.
Akkusativ	Sie reinigt die kleinen Aquarien.She cleans the small aquariums.	Ich mag schöne Aquarien sehr.I like beautiful aquariums very much.	Ich sehe keine Aquarien dort.I don't see any aquariums there.
Dativ	Er hilft den alten Aquarien.He helps the old aquariums.	Ich gebe vielen Aquarien Wasser.I give water to many aquariums.	Sie spielt mit keinen Aquarien.She doesn't play with any aquariums.
Genitiv	Die Pflege der großen Aquarien ist aufwendig.The care of the large aquariums is elaborate.	Das Design vieler Aquarien ist modern.The design of many aquariums is modern.	Ich sehe die Fische keiner Aquarien.I don't see the fish of any aquariums.

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Frequently asked questions

Everything you might wonder about der, die, das — and the Der Artikel app.

Is it der, die, or das Aquarium?

It is das Aquarium. In German, every noun has a grammatical gender, and Aquarium is neuter. You should always learn the article together with the noun to ensure your German grammar is correct.

What is the plural of das Aquarium?

The plural form of das Aquarium is die Aquarien. In German, regardless of the singular gender, all plural nouns use the definite article “die.”

What does das Aquarium mean in English?

The German word das Aquarium translates to “aquarium” in English.

How do you decline das Aquarium?

Like all German nouns, Aquarium changes its article depending on the case. In the singular, the forms are:

Nominativ: das Aquarium
Akkusativ: das Aquarium
Dativ: dem Aquarium
Genitiv: des Aquariums

These changes are necessary because German uses cases to indicate the noun’s role in a sentence (such as the subject or object). Knowing these forms allows you to build grammatically correct sentences.