1
general::
Phrase(s): welcome to do something
free to do something; allowed to do something. • The audience is welcome to ask questions at the end of the speech. • You are welcome to help yourself to anything in the kitchen., Phrase(s): welcome someone to something
to greet someone who has come into something or some place. • I am very pleased to welcome you to Adamsville! • They welcomed us to the party and showed us where to put our coats and hats.
McGrawhill's American Idioms And Phrasal Verbs
2
general::
Be cordially or freely allowed to, as in You're most welcome to join us, or You're welcome to borrow my boat whenever you like. [1300s] Also see YOU' RE WELCOME.
American Heritage Idioms