This is the 4596th most frequent Polish word.
maturalne
"Maturalne" relates to the matura, the Polish high school leaving exam.
Here, 'maturalnego' is used in its adjectival form to describe 'egzamin' (exam), indicating it relates to the high school final exam.
Uczniowie przygotowują się do maturalnego egzaminu.
Students are preparing for the school-leaving exam.
Here, 'maturalnych' describes 'przedmiotach' (subjects), denoting that these subjects are relevant to the high school final exams.
Postanowiła skupić się na swoich maturalnych przedmiotach.
She decided to focus on her school-leaving subjects.
In this context, 'maturalne spotkania' means meetings related to preparations for the high school final exams.