This is the 4457th most frequent Russian word.
возрастные
"Возрастные" means "age-related" in English.
Here, "возрастные" describes changes that are associated with age, explaining its use as an adjective meaning 'related to age' or 'age-related'.
Возрастные изменения являются естественными процессами.
Age-related changes are natural processes.
In this sentence, "возрастные" modifies 'restrictions' to indicate that the restrictions are defined based on age categories, thus showing its use in a regulatory context.
У этого фильма есть возрастные ограничения.
This movie has age restrictions.
Here, "возрастные" describes groups categorized by age, demonstrating its use in classification.