This is the 5389th most frequent Russian word.
очередное
"Очередное" means "next" or "regular" in the sense of something occurring in order or routinely.
In this sentence, 'очередное' modifies 'собрание' (meeting) to indicate it is one more in a series or sequence.
Это очередное собрание на этой неделе.
This is another meeting this week.
Here, 'очередное' relates to 'испытание' (challenge) and means the next or subsequent in a sequence.
Очередное испытание оказалось сложным.
The next challenge turned out to be difficult.
In this example, 'очередное' describes 'занятие' (class), referring to the next scheduled event in a sequence.