Formal term for an invited guest at a ceremony, conference, or official event. Often used in set phrases like 来賓の挨拶 (guest speech) or 来賓席 (guest seating).
I was invited to the wedding as a guest.
来賓の方々にご挨拶をいただきます。
We will now have a speech from our distinguished guests.
He attended the ceremony as an invited guest.
They invited the mayor as a guest of honor.
We asked the guest to give a speech at the graduation ceremony.