Meaning of UNITY in English

UNITY

u ‧ ni ‧ ty W3 /ˈjuːnəti, ˈjuːnɪti/ BrE AmE noun ( plural unities )

[ Date: 1200-1300 ; Language: Old French ; Origin: unité , from Latin unitas , from unus 'one' ]

1 . [uncountable] when a group of people or countries agree or are joined together:

economic unity

European unity

2 . [uncountable] the quality of having matching parts:

His essays often lack unity.

3 . [countable] technical one of the three related principles that say a play should be about a single set of related events which happen in one place on one day

Longman Dictionary of Contemporary English.      Longman - Словарь современного английского языка.