Become one (3)
'become one' is the definition.
(uniting is a kind of becoming one)
This is the entire clue.
(Other definitions for unite that I've seen before include "Combine - join" , "Put together" , "Link" , "Join together, become one" , "Come, or join together" .)
(Other definitions for merge that I've seen before include "Join into one" , "Amalgamate" , "Combine elements" , "Become combined" , "Come together as one" .)
'become one' is the definition.
(thesaurus)
This is the entire clue.
(Other definitions for wed that I've seen before include "Unite closely" , "Joined in the dew" , "Join" , "Marry" , "Take in marriage" .)