adjective, friend·li·er, friend·li·est.

1.  Characteristic of or befitting a friend; showing friendship: a friendly greeting.
2.  Like a friend; kind; helpful: a little friendly advice.
3.  Favorably disposed; inclined to approve, help, or support: a friendly bank.
4.  Not hostile or at variance; amicable: a friendly warship; friendly natives.
5.  Computers. user-friendly.