Honorific noun used to refer respectfully to someone's visit or arrival. Often used in set phrases like お越しいただく or お越しください.
We would love for you to come visit us sometime.
Thank you for coming today.
Please feel free to come by.
We look forward to your coming to the venue.
Please let us know when you visit our shop.
いらっしゃる is an honorific verb meaning 'to come/go/be,' whereas お越し is the corresponding honorific noun typically used in set phrases like お越しになる.
参る is the humble verb used when speaking modestly of one's own coming or going, while お越し respectfully refers to the listener's or another person's visit.
伺う is the humble verb for 'to visit/call on,' used for one's own visit, in contrast to お越し which honors someone else's coming.
お越し is the honorific way to refer respectfully to someone's coming or visiting, while 来訪 is a neutral formal noun describing the same event.
起こし (おこし) means 'waking someone up' or 'raising,' a completely different word that happens to share the same pronunciation as お越し.
Standard honorific noun form; the prefix お is part of the word.
Formal kanji spelling using 御 for お; rarely used in modern writing.
Noun form of the honorific verb お越しになる, from 越す (to cross over) with the honorific prefix お.