Questions & Answers about Die seisoen is lank.
Die is the definite article in Afrikaans, so here it means the.
A useful thing to know is that Afrikaans does not change the article for gender. Unlike languages such as German or French, you do not have to learn different words for the depending on whether the noun is masculine, feminine, or neuter. It is simply die for plural nouns and many singular nouns in everyday use.