(a word of kindly greeting, as to one whose arrival gives pleasure)

Welcome, stranger!

a kindly greeting or reception, as to one whose arrival gives pleasure

to give someone a warm welcome.

to greet the arrival of (a person, guests, etc.) with pleasure or kindly courtesy.

to receive or accept with pleasure; regard as pleasant or good

to welcome a change.

to meet, accept, or receive (an action, challenge, person, etc.) in a specified, esp. unfriendly, manner

They welcomed him with hisses and catcalls.

gladly received, as one whose arrival gives pleasure

a welcome visitor.

agreeable, as something arriving, occurring, or experienced

a welcome rest.

given full right by the cordial consent of others

She is welcome to try it.

without obligation for the courtesy or favor received (used as a conventional response to expressions of thanks)

You're quite welcome.

wear out one's welcome

to make one's visits so frequent or of such long duration that they become offensive

Your cousins have long since worn out their welcome.