From Longman Dictionary of Contemporary English u‧ni‧ty /ˈjuːnəti/ ●●○ W3 noun (plural unities) 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...