n.

1. 单一（性）[U]
2. 团结；联合；统一（性）；一致（性）[U][（+with）]
   There is a need for greater unity in the party.

   党内有必要加强团结。

3. 统一体；整体；个体[C]
4. 和谐，融洽[U][（+with）]
   Brothers and sisters should live together in unity.

   兄弟姐妹应当在一起和睦相处。

5. 一贯性[U]
   There is little unity of purpose among the members.

   成员间缺乏坚定不移的目标。

6. 【数】（数或数字）一[U]

n.

1. the state of being united.
   ▸a thing forming a complex whole.
2. Mathematics  the number one.
3. a dramatic principle requiring limitation of the supposed time of a drama to that occupied in acting it or to a single day (unity of time), use of one scene throughout (unity of place), or concentration on a single plot (unity of action).