1. 联合（状态）；统一（状态）
Unity is the state of different areas or groups being joined together to form a single country or organization.
2. 团结；一致
When there is unity, people are in agreement and act together for a particular purpose.
1. the quality of being united into one
Synonym: oneness
2. the smallest whole number or a numeral representing this number
e.g. he has the one but will need a two and three to go with it
they had lunch at one
3. an undivided or unbroken completeness or totality with nothing wanting
e.g. the integrity of the nervous system is required for normal development
he took measures to insure the territorial unity of Croatia