der. die. das.
Articles and the four cases.

der, die, and das look like three separate words for "the". They are not. They are the Nominativ forms of one article, and across all four cases and three genders, that one article only ever appears as one of six words → der, die, das, den, dem, des. Sixteen slots in the table below, six words to fill them.

The starting point: Nominativ

In the Nominativ, the article tells you the noun's gender directly. der for masculine, die for feminine, das for neuter, and die again for the plural, regardless of gender.

Gender	Nominativ	Example
Masculine	der	derMann
Feminine	die	dieFrau
Neuter	das	dasKind
Plural	die	dieKinder

The full table: every case, every gender

This is the table every German learner eventually memorizes, in one form or another. Each row is a case, color-coded the same way as everywhere else on this site. Each column is a gender, plus the plural, which behaves the same across all genders.

Case	Masculine	Feminine	Neuter	Plural
Nominativ	der	die	das	die
Akkusativ	den	die	das	die
Dativ	dem	der	dem	den (+n)
Genitiv	des (+es)	der	des (+es)	der

Two patterns make this table much smaller than it looks. First, the Akkusativ is identical to the Nominativ everywhere except the masculine singular, where der becomes den. Second, the plural always borrows feminine singular forms → die, die, der, with only the Dativ plural, den, standing on its own (and adding -n to the noun if it doesn't already end in one).

Only six words, used sixteen times

Counting across the whole table, the sixteen cells reduce to just six distinct words.

Word	Appears as
der	masculine Nominativ, feminine Dativ, feminine and plural Genitiv
die	feminine Nominativ and Akkusativ, plural Nominativ and Akkusativ
das	neuter Nominativ and Akkusativ
den	masculine Akkusativ, plural Dativ
dem	masculine and neuter Dativ
des	masculine and neuter Genitiv

Notice the gradient colors in the table: articles with multiple meanings use a blend of their possible case colors. der shifts from yellow (Nominativ) through blue (Dativ) to pink (Genitiv), showing all three cases it can represent. This visual pattern makes the ambiguity visible at a glance.

der is the busiest word in the table, and also the most ambiguous. Seeing der Frau could mean "to the woman" (Dativ) or "of the woman" (Genitiv), and only the verb or the rest of the sentence resolves which.

The Genitiv brings a noun ending too

In the masculine and neuter Genitiv, the article is not the only thing that changes. The noun itself usually adds -es (for short nouns) or -s (for longer ones). desMannes, desKindes, desComputers. Feminine and plural nouns never add this ending, since their Genitiv article, der, already carries all the information.

For the full picture on the Genitiv, including the noun endings: Genitiv case.

Articles fuse with prepositions

Several common prepositions merge with the Dativ and Akkusativ neuter or masculine forms of der/das into a single word. The meaning does not change, only the spelling.

Preposition + article	Becomes	Example
in dem	im	imHaus
zu dem	zum	zumBahnhof
zu der	zur	zurSchule
an das	ans	ansFenster
von dem	vom	vomBahnhof

These contractions are common enough that the unfused version, indemHaus instead of imHaus, can sound overly formal or emphatic. They are worth recognizing as the article in disguise, not as new vocabulary.

For the indefinite counterpart and what happens where there is no plural: ein, eine, kein. The indefinite articles. For the bigger picture on word classes: Artikel. Three jobs in one syllable.