welcome /ˈwelkəm/ exclamation
A2 said to someone who has just arrived somewhere: Welcome home! Welcome to the UK.
you’re welcome A2 said as a polite answer when someone thanks you for doing something: ‘It was very kind of you to help.’ ‘You’re welcome.’
B1 If you are welcome, people are pleased that you are there: You will always be welcome here.
be welcome to do something B1 used to tell someone that they can certainly do something, if they want to: Anyone who is interested is welcome to come.