Questions about example sentences with, and the definition and usage of "Welcome"

A: It is a phrase that is typically told to someone coming back to somewhere they have been before.

おかえり (casual)
おかえりなさい (normal)
おかえりなさいませ (formal)

[note: sorry if my Japanese is lacking!]

A: It means that the person is welcoming them more into their personal life getting to know them more
But... it could also be used as something sexual... Like an intro to sex haha

A: staying "on the grind" means to work hard

A: It's slang for something boring. Usually a repetitive job. It's mildly sarcastic.

A: Welcome!
Welcome home.
Welcome back.
You're welcome.
You're welcome to the food.
That's welcoming of you.
Did you welcome him back home?

A: Welcome aboard the plane. Please sit, and we'll be taking off soon.

Is this the Ferry to Kish island?
It is indeed, sir. Welcome aboard.

A: Please welcome your new colleague.
Welcome to our house.
You are always welcome to come back.
You're welcome. - Answer to "Thank you."
You're not welcome here anymore. (If you don't want that person to come to that place any more.)

A: -Welcome to the Royal Hotel.
-Welcome to my humble house.
-Welcome aboard!
(Thanks you) Welcome!

A: “Welcome”- a greeting or someone saying you are welcome in a place.
“Be welcome” is the state of being welcome somewhere.

A: Welcome! = Thank you for coming to this place
You're welcome! = I acknowledge your thanks

A: Do you have a reservation at this hotel?
B: Yes, I'm staying for three nights.
A: Have you ever been to this city before?
B: No, it's my first time here.
A: Oh, welcome! (= thank you for coming; I'm glad you are here)
B: Do you have any recommendations for places to eat?
A: There's a very good Thai restaurant on Maple Avenue.
B: That sounds perfect! Thank you.
A: You're welcome! (= I acknowledge the thanks)

A: We don’t really use “welcome please.” We use them both separately, though.

Welcome to my store.

Please, help yourself.

You’re welcome. Have a nice day.

A: Welcome to my home. Welcome to the class. Often used to greet people who come to your place or event.
You are welcome to have some of the food (any other thing). "You are welcome" is often also used as a response to someone saying "Thank You".

A: Are the same

A: probably, "you're welcome to jump in/out at any time!"
or
"feel free to join in/quit at any time!"

A: Check the question to view the answer

A: Check the question to view the answer

A: Welcome

A: Check the question to view the answer

A: We welcome you to join us.

We welcome you to join us today/tomorrow/next week...
~~~
You are welcome to join us.

You are welcome to join us today/tomorrow/next week...

A: sounds very natural to me :)

A: Check the question to view the answer

A: try stretching out the e in welcome a little longer

A: Do you mean the man who is getting married?