u ‧ nite /juːˈnaɪt/ BrE AmE verb
[ Date: 1400-1500 ; Language: Late Latin ; Origin: past participle of unire , from Latin unus 'one' ]
[intransitive and transitive] if different people or organizations unite, or if something unites them, they join together in order to achieve something ⇨ union :
Our goal is to unite the opposition parties and defeat the President.
unite against/behind
Party members united behind their leader.
unite to do something
In 1960, the regions united to form the Somali Republic.