Is Tournee der, die or das?

The correct German article for Tournee is die. The noun Tournee is Feminine. So you always say: die Tournee. Learn the article together with the noun — German nouns don't follow predictable gender rules most of the time.

The plural of Tournee is: die Tourneen. In the plural, every German noun takes the article "die". So: die Tourneen. Example: ein Tournee → zwei Tourneen.

Correct: die Tourneen. The form "die Tournees" is wrong. The plural of die Tournee is die Tourneen. In the nominative plural, you always use the article "die".

die Tournee follows the four German cases. Nominative: die Tournee, Accusative: die Tournee, Dative: der Tournee, Genitive: der Tournee. In plural: die Tourneen / den Tourneen. Learn these forms together with the noun.

The genitive singular of die Tournee is: der Tournee. The genitive plural is der Tourneen. German uses the genitive to express possession or belonging. Example: die Farbe der Tournee.

The dative plural of Tournee is: den Tourneen. In German, dative plural nouns usually end in "-n". So you say: "mit den Tourneen". Use this case after prepositions like mit, von, bei, zu.

Tournee ends in -e. German nouns with this ending are almost always feminine. Nouns ending in -e are often feminine (die), especially two-syllable words. That's why the article for Tournee is die.

Tournee is a noun and must be capitalized in German. You'll find example sentences above for each case. The article die stays the same in nominative singular but changes in other cases. Practice declension in your own sentences.

Yes, Tournee is a noun (also called a substantive). German nouns are always capitalized. The article for Tournee is die. Every German noun has a fixed article you must memorize.