1The honorific (respectful) special verb covering 'to come', 'to go', and 'to be (somewhere)'—used for people of higher status or customers.
先生はもう教室にいらっしゃいますか。
Is the teacher already in the classroom?
どうぞ、ゆっくりいらっしゃってください。
Please, take your time coming over.
明日は大勢のお客様がいらっしゃる予定です。
Many guests are expected to come tomorrow.
2Used as an honorific auxiliary after a -te form or the particle で, indicating an ongoing action or state—the respectful equivalent of '〜している'.
社長は会議室でお待ちになっていらっしゃいます。
The president is waiting in the conference room.
お客様は今、展示場をご覧になっていらっしゃいます。
The guests are currently looking around the exhibition hall.
先生は研究室で何を読んでいらっしゃるんですか。
What is the teacher reading in the research office?