This is the 3305th most frequent Russian word.
официальное
Official.
In this sentence, 'официальное' is used as the adjective describing the type of meeting as formal or authorized.
У нас на работе сегодня было официальное собрание.
Today at work we had an official meeting.
Here, 'официальное' modifies 'разрешение,' indicating that the license is authorized or sanctioned.
Магазин на углу имеет официальное разрешение на продажу алкоголя.
The corner store has an official license to sell alcohol.
In this context, 'официальный,' the masculine form, is used to describe the type of clothing style as formal or suitable for professional environments.