(1)連絡をとるか、集まる
(2)1つになる
(3)become one; "Germany unified officially in 1990"; "the cells merge"
(4)make contact or come together; "The two roads join here"
さらに詳しく
(1)組み合させを持つ
(2)have or possess in combination; "she unites charm with a good business sense"