This is the 2369th most frequent Korean word.
공식적인
"Official" or "formal."
Here, '공식적인' describes the formal and professional nature of the meeting.
이 회의는 매우 공식적인 분위기로 진행되었습니다.
This meeting was conducted in a very formal atmosphere.
'공식적인' is used to convey that the announcement is official, as opposed to informal or unofficial.
공식적인 발표는 내일 아침에 있을 예정입니다.
The official announcement is scheduled for tomorrow morning.
In this case, '공식적인' signifies that the interaction between them is kept formal, not personal or casual.