noun
Honorific noun for someone's return, often used in set phrases like お帰りになる or お帰りです.
社長は明日お帰りになります。
The company president will return tomorrow (honorific).
お
Please drop by on your way back (honorific).
interjection
welcome home; welcome back
Abbreviation of お帰りなさい, used as a casual interjection when someone returns home or to a familiar place.
See also: お帰りなさい
ただいま。—お帰り！
I'm home. — Welcome back!