lie adjacent to another; "Canada adjoins the U.S."
be in contact with
attach or add; "I adjoin a copy of your my lawyer''s letter"
be in direct physical contact with; make contact; "The two buildings touch"; "Their hands touched"; "The wire must not contact the metal cover"; "The surfaces contact at this point"
lie adjacent to another or share a boundary; "Canada adjoins the U.S."; "England marches with Scotland"