This is the 1463rd most frequent Korean word.
초청
Invitation.
In this sentence, '초청' signifies a formal invitation extended by someone with authority or an important position.
그는 장관의 초청을 받아 회의에 참석했다.
He attended the meeting upon the minister's invitation.
Here, '초청장' refers specifically to a physical invitation card, highlighting '초청' as a act leading to a formal event.
초청장을 받고 나서 그녀는 바로 답장을 보냈다.
After receiving the invitation card, she promptly replied.
In this usage, '초청 강연' incorporates the concept of '초청' into an event description, implying that the lecture was conducted through a formal invitation.